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1022012201221 = 1192910200111
BaseRepresentation
bin11101101111101001010…
…11001001100100000101
310121200222210021002212221
432313310223021210011
5113221040110414341
62101301140212341
7133560262242544
oct16676453114405
93550883232787
101022012201221
11364484275530
121460a599a0b1
13754b580028b
1437673a8215b
151b8b8ea4ed1
hexedf4ac9905

1022012201221 has 4 divisors (see below), whose sum is σ = 1114922401344. Its totient is φ = 929102001100.

The previous prime is 1022012201183. The next prime is 1022012201227. The reversal of 1022012201221 is 1221022102201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1022012201221 - 239 = 472256387333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022012201195 and 1022012201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022012201227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46455100045 + ... + 46455100066.

It is an arithmetic number, because the mean of its divisors is an integer number (278730600336).

Almost surely, 21022012201221 is an apocalyptic number.

1022012201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1022012201221 is a deficient number, since it is larger than the sum of its proper divisors (92910200123).

1022012201221 is an equidigital number, since it uses as much as digits as its factorization.

1022012201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92910200122.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1022012201221 its reverse (1221022102201), we get a palindrome (2243034303422).

The spelling of 1022012201221 in words is "one trillion, twenty-two billion, twelve million, two hundred one thousand, two hundred twenty-one".

Divisors: 1 11 92910200111 1022012201221