21221112001022 has 16 divisors (see below), whose sum is σ = 32164286537040. Its totient is φ = 10499713475328.

The previous prime is 21221112001007. The next prime is 21221112001057. The reversal of 21221112001022 is 22010021112212.

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, 6175853 + ... + 8976824.

It is an arithmetic number, because the mean of its divisors is an integer number (2010267908565).

Almost surely, 2^{21221112001022} is an apocalyptic number.

21221112001022 is a deficient number, since it is larger than the sum of its proper divisors (10943174536018).

21221112001022 is a wasteful number, since it uses less digits than its factorization.

21221112001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15159995.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221112001022 its reverse (22010021112212), we get a palindrome (43231133113234).

The spelling of 21221112001022 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, one thousand, twenty-two".