21220112112000 has 128 divisors (see below), whose sum is σ = 70344671810400. Its totient is φ = 5658696550400.

The previous prime is 21220112111981. The next prime is 21220112112011. The reversal of 21220112112000 is 21121102212.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220994835 + ... + 221090834.

Almost surely, 2^{21220112112000} is an apocalyptic number.

21220112112000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220112112000 is an abundant number, since it is smaller than the sum of its proper divisors (49124559698400).

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

21220112112000 is an equidigital number, since it uses as much as digits as its factorization.

21220112112000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442085701 (or 442085679 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21220112112000 its reverse (21121102212), we get a palindrome (21241233214212).

The spelling of 21220112112000 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, one hundred twelve thousand".