21021022222102 has 64 divisors (see below), whose sum is σ = 36472083148800. Its totient is φ = 8900846735616.

The previous prime is 21021022222063. The next prime is 21021022222117. The reversal of 21021022222102 is 20122222012012.

It is a super-2 number, since 2×21021022222102² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21021022222102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238189528 + ... + 238277764.

It is an arithmetic number, because the mean of its divisors is an integer number (569876299200).

Almost surely, 2^{21021022222102} is an apocalyptic number.

21021022222102 is a deficient number, since it is larger than the sum of its proper divisors (15451060926698).

21021022222102 is a wasteful number, since it uses less digits than its factorization.

21021022222102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89045.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21021022222102 its reverse (20122222012012), we get a palindrome (41143244234114).

The spelling of 21021022222102 in words is "twenty-one trillion, twenty-one billion, twenty-two million, two hundred twenty-two thousand, one hundred two".