21112211112000 has 112 divisors (see below), whose sum is σ = 69712521171072. Its totient is φ = 5629922956800.

The previous prime is 21112211111987. The next prime is 21112211112077. The reversal of 21112211112000 is 21111221112.

It is a happy number.

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

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, 439813732 + ... + 439861731.

Almost surely, 2^{21112211112000} is an apocalyptic number.

21112211112000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112211112000 is an abundant number, since it is smaller than the sum of its proper divisors (48600310059072).

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

21112211112000 is an equidigital number, since it uses as much as digits as its factorization.

21112211112000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879675493 (or 879675473 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21112211112000 its reverse (21111221112), we get a palindrome (21133322333112).

The spelling of 21112211112000 in words is "twenty-one trillion, one hundred twelve billion, two hundred eleven million, one hundred twelve thousand".