21221112120110 has 32 divisors (see below), whose sum is σ = 43682718320640. Its totient is φ = 7271166686112.

The previous prime is 21221112120107. The next prime is 21221112120193. The reversal of 21221112120110 is 1102121112212.

It is a super-2 number, since 2×21221112120110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96622520 + ... + 96841899.

It is an arithmetic number, because the mean of its divisors is an integer number (1365084947520).

Almost surely, 2^{21221112120110} is an apocalyptic number.

21221112120110 is an abundant number, since it is smaller than the sum of its proper divisors (22461606200530).

21221112120110 is a wasteful number, since it uses less digits than its factorization.

21221112120110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193466000.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21221112120110 its reverse (1102121112212), we get a palindrome (22323233232322).

The spelling of 21221112120110 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, one hundred twenty thousand, one hundred ten".