21100031221022 has 16 divisors (see below), whose sum is σ = 34093512247200. Its totient is φ = 9735948397152.

The previous prime is 21100031220991. The next prime is 21100031221043. The reversal of 21100031221022 is 22012213000112.

It is a super-2 number, since 2×21100031221022² (a number of 27 digits) contains 22 as substring.

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, 105212522 + ... + 105412877.

It is an arithmetic number, because the mean of its divisors is an integer number (2130844515450).

Almost surely, 2^{21100031221022} is an apocalyptic number.

21100031221022 is a deficient number, since it is larger than the sum of its proper divisors (12993481026178).

21100031221022 is a wasteful number, since it uses less digits than its factorization.

21100031221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210629267.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21100031221022 its reverse (22012213000112), we get a palindrome (43112244221134).

The spelling of 21100031221022 in words is "twenty-one trillion, one hundred billion, thirty-one million, two hundred twenty-one thousand, twenty-two".