21021000121122 has 32 divisors (see below), whose sum is σ = 42937689053952. Its totient is φ = 6857726753664.

The previous prime is 21021000121109. The next prime is 21021000121127. The reversal of 21021000121122 is 22112100012012.

It is a super-2 number, since 2×21021000121122² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21021000121127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9462838 + ... + 11471150.

It is an arithmetic number, because the mean of its divisors is an integer number (1341802782936).

Almost surely, 2^{21021000121122} is an apocalyptic number.

21021000121122 is an abundant number, since it is smaller than the sum of its proper divisors (21916688932830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21021000121122 is a wasteful number, since it uses less digits than its factorization.

21021000121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045482.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21021000121122 its reverse (22112100012012), we get a palindrome (43133100133134).

The spelling of 21021000121122 in words is "twenty-one trillion, twenty-one billion, one hundred twenty-one thousand, one hundred twenty-two".