21222120111102 has 24 divisors (see below), whose sum is σ = 48401326569960. Its totient is φ = 6701722140240.

The previous prime is 21222120111067. The next prime is 21222120111107. The reversal of 21222120111102 is 20111102122212.

21222120111102 is a `hidden beast` number, since 212 + 221 + 20 + 111 + 102 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222120111107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31026491049 + ... + 31026491732.

It is an arithmetic number, because the mean of its divisors is an integer number (2016721940415).

Almost surely, 2^{21222120111102} is an apocalyptic number.

21222120111102 is an abundant number, since it is smaller than the sum of its proper divisors (27179206458858).

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

21222120111102 is a wasteful number, since it uses less digits than its factorization.

21222120111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62052982808 (or 62052982805 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21222120111102 its reverse (20111102122212), we get a palindrome (41333222233314).

The spelling of 21222120111102 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty million, one hundred eleven thousand, one hundred two".