21011112112000 has 64 divisors (see below), whose sum is σ = 52238877528240. Its totient is φ = 8404444838400.

The previous prime is 21011112111973. The next prime is 21011112112027. The reversal of 21011112112000 is 21121111012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21011112111973) and next prime (21011112112027).

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 656581254 + ... + 656613253.

Almost surely, 2^{21011112112000} is an apocalyptic number.

21011112112000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011112112000 is an abundant number, since it is smaller than the sum of its proper divisors (31227765416240).

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

21011112112000 is an equidigital number, since it uses as much as digits as its factorization.

21011112112000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313194536 (or 1313194514 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21011112112000 its reverse (21121111012), we get a palindrome (21032233223012).

The spelling of 21011112112000 in words is "twenty-one trillion, eleven billion, one hundred twelve million, one hundred twelve thousand".