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2002221212021 = 9472114277943
BaseRepresentation
bin11101001000101101101…
…011110010000101110101
321002102002020110010000222
4131020231223302011311
5230301022112241041
64131450245144125
7264440623331612
oct35105553620565
97072066403028
102002221212021
117021567492a8
122840639bb045
13116a687b1a04
146cc9d88d509
1537137ed974b
hex1d22daf2175

2002221212021 has 4 divisors (see below), whose sum is σ = 2004335490912. Its totient is φ = 2000106933132.

The previous prime is 2002221212009. The next prime is 2002221212053. The reversal of 2002221212021 is 1202121222002.

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 a de Polignac number, because none of the positive numbers 2k-2002221212021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002221212521) 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, 1057138025 + ... + 1057139918.

It is an arithmetic number, because the mean of its divisors is an integer number (501083872728).

Almost surely, 22002221212021 is an apocalyptic number.

It is an amenable number.

2002221212021 is a deficient number, since it is larger than the sum of its proper divisors (2114278891).

2002221212021 is an equidigital number, since it uses as much as digits as its factorization.

2002221212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114278890.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2002221212021 its reverse (1202121222002), we get a palindrome (3204342434023).

The spelling of 2002221212021 in words is "two trillion, two billion, two hundred twenty-one million, two hundred twelve thousand, twenty-one".

Divisors: 1 947 2114277943 2002221212021