21100100021022 has 16 divisors (see below), whose sum is σ = 46036581864192. Its totient is φ = 6393969703320.

The previous prime is 21100100020997. The next prime is 21100100021057. The reversal of 21100100021022 is 22012000100112.

It is a super-5 number, since 5×21100100021022⁵ (a number of 68 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21100100020989 and 21100100021007.

It is a congruent number.

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, 159849242518 + ... + 159849242649.

It is an arithmetic number, because the mean of its divisors is an integer number (2877286366512).

Almost surely, 2^{21100100021022} is an apocalyptic number.

21100100021022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21100100021022 is an abundant number, since it is smaller than the sum of its proper divisors (24936481843170).

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

21100100021022 is a wasteful number, since it uses less digits than its factorization.

21100100021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319698485183.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21100100021022 its reverse (22012000100112), we get a palindrome (43112100121134).

The spelling of 21100100021022 in words is "twenty-one trillion, one hundred billion, one hundred million, twenty-one thousand, twenty-two".