21001102220022 has 16 divisors (see below), whose sum is σ = 42629103014592. Its totient is φ = 6895884310920.

The previous prime is 21001102220011. The next prime is 21001102220027. The reversal of 21001102220022 is 22002220110012.

It is a junction number, because it is equal to n+sod(n) for n = 21001102219983 and 21001102220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001102220027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26120773504 + ... + 26120774307.

It is an arithmetic number, because the mean of its divisors is an integer number (2664318938412).

Almost surely, 2^{21001102220022} is an apocalyptic number.

21001102220022 is an abundant number, since it is smaller than the sum of its proper divisors (21628000794570).

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

21001102220022 is a wasteful number, since it uses less digits than its factorization.

21001102220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52241547883.

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

Adding to 21001102220022 its reverse (22002220110012), we get a palindrome (43003322330034).

The spelling of 21001102220022 in words is "twenty-one trillion, one billion, one hundred two million, two hundred twenty thousand, twenty-two".