21222211053144 has 64 divisors (see below), whose sum is σ = 53601491623680. Its totient is φ = 7001645616000.

The previous prime is 21222211053079. The next prime is 21222211053161. The reversal of 21222211053144 is 44135011222212.

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, 10660212 + ... + 12493379.

It is an arithmetic number, because the mean of its divisors is an integer number (837523306620).

Almost surely, 2^{21222211053144} is an apocalyptic number.

21222211053144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21222211053144 is an abundant number, since it is smaller than the sum of its proper divisors (32379280570536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222211053144 is a wasteful number, since it uses less digits than its factorization.

21222211053144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23153992 (or 23153988 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 21222211053144 its reverse (44135011222212), we get a palindrome (65357222275356).

The spelling of 21222211053144 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, fifty-three thousand, one hundred forty-four".