21020022100122 has 32 divisors (see below), whose sum is σ = 44253051909120. Its totient is φ = 6637845645360.

The previous prime is 21020022100117. The next prime is 21020022100171. The reversal of 21020022100122 is 22100122002012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14001247 + ... + 15429677.

It is an arithmetic number, because the mean of its divisors is an integer number (1382907872160).

Almost surely, 2^{21020022100122} is an apocalyptic number.

21020022100122 is an abundant number, since it is smaller than the sum of its proper divisors (23233029808998).

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

21020022100122 is a wasteful number, since it uses less digits than its factorization.

21020022100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557538.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21020022100122 its reverse (22100122002012), we get a palindrome (43120144102134).

The spelling of 21020022100122 in words is "twenty-one trillion, twenty billion, twenty-two million, one hundred thousand, one hundred twenty-two".