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122111201021 = 405130143471
BaseRepresentation
bin111000110111001100…
…1010000111011111101
3102200012010202201211212
41301232121100323331
54000040431413041
6132032550454205
711552013040265
oct1615631207375
9380163681755
10122111201021
1147872653757
121b7ba964365
13b6906c7644
145ca58aa7a5
15329a4d18eb
hex1c6e650efd

122111201021 has 4 divisors (see below), whose sum is σ = 122141348544. Its totient is φ = 122081053500.

The previous prime is 122111200999. The next prime is 122111201071. The reversal of 122111201021 is 120102111221.

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 a de Polignac number, because none of the positive numbers 2k-122111201021 is a prime.

It is a super-2 number, since 2×1221112010212 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 122111200987 and 122111201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122111201071) 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, 15067685 + ... + 15075786.

It is an arithmetic number, because the mean of its divisors is an integer number (30535337136).

Almost surely, 2122111201021 is an apocalyptic number.

It is an amenable number.

122111201021 is a deficient number, since it is larger than the sum of its proper divisors (30147523).

122111201021 is an equidigital number, since it uses as much as digits as its factorization.

122111201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30147522.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 122111201021 its reverse (120102111221), we get a palindrome (242213312242).

The spelling of 122111201021 in words is "one hundred twenty-two billion, one hundred eleven million, two hundred one thousand, twenty-one".

Divisors: 1 4051 30143471 122111201021