21010100021122 has 16 divisors (see below), whose sum is σ = 32887921957632. Its totient is φ = 10047530146720.

The previous prime is 21010100021117. The next prime is 21010100021137. The reversal of 21010100021122 is 22112000101012.

It is a super-2 number, since 2×21010100021122² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17094163 + ... + 18281974.

It is an arithmetic number, because the mean of its divisors is an integer number (2055495122352).

Almost surely, 2^{21010100021122} is an apocalyptic number.

21010100021122 is a deficient number, since it is larger than the sum of its proper divisors (11877821936510).

21010100021122 is a wasteful number, since it uses less digits than its factorization.

21010100021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35389073.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21010100021122 its reverse (22112000101012), we get a palindrome (43122100122134).

The spelling of 21010100021122 in words is "twenty-one trillion, ten billion, one hundred million, twenty-one thousand, one hundred twenty-two".