21122102221210 has 16 divisors (see below), whose sum is σ = 40020825261600. Its totient is φ = 8004165052176.

The previous prime is 21122102221159. The next prime is 21122102221273. The reversal of 21122102221210 is 1212220122112.

It is a super-2 number, since 2×21122102221210² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 55584479340 + ... + 55584479719.

It is an arithmetic number, because the mean of its divisors is an integer number (2501301578850).

Almost surely, 2^{21122102221210} is an apocalyptic number.

21122102221210 is a deficient number, since it is larger than the sum of its proper divisors (18898723040390).

21122102221210 is a wasteful number, since it uses less digits than its factorization.

21122102221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111168959085.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21122102221210 its reverse (1212220122112), we get a palindrome (22334322343322).

The spelling of 21122102221210 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred two million, two hundred twenty-one thousand, two hundred ten".