21220102112 has 24 divisors (see below), whose sum is σ = 45574992792. Its totient is φ = 9645500800.

The previous prime is 21220102097. The next prime is 21220102129. The reversal of 21220102112 is 21120102212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30141839 + ... + 30142542.

It is an arithmetic number, because the mean of its divisors is an integer number (1898958033).

Almost surely, 2^21220102112 is an apocalyptic number.

21220102112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21220102112 is an abundant number, since it is smaller than the sum of its proper divisors (24354890680).

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

21220102112 is a wasteful number, since it uses less digits than its factorization.

21220102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60284402 (or 60284394 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21220102112 its reverse (21120102212), we get a palindrome (42340204324).

The spelling of 21220102112 in words is "twenty-one billion, two hundred twenty million, one hundred two thousand, one hundred twelve".