21021121234122 has 16 divisors (see below), whose sum is σ = 42042702979200. Its totient is φ = 7006963659552.

The previous prime is 21021121234027. The next prime is 21021121234229. The reversal of 21021121234122 is 22143212112012.

It is a super-2 number, since 2×21021121234122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21021121234092 and 21021121234101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18593122 + ... + 19691277.

It is an arithmetic number, because the mean of its divisors is an integer number (2627668936200).

Almost surely, 2^{21021121234122} is an apocalyptic number.

21021121234122 is an abundant number, since it is smaller than the sum of its proper divisors (21021581745078).

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

21021121234122 is a wasteful number, since it uses less digits than its factorization.

21021121234122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38375917.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21021121234122 its reverse (22143212112012), we get a palindrome (43164333346134).

The spelling of 21021121234122 in words is "twenty-one trillion, twenty-one billion, one hundred twenty-one million, two hundred thirty-four thousand, one hundred twenty-two".