21000112111110 has 32 divisors (see below), whose sum is σ = 54982111709952. Its totient is φ = 5090936269280.

The previous prime is 21000112111091. The next prime is 21000112111141. The reversal of 21000112111110 is 1111121100012.

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, 31818351354 + ... + 31818352013.

It is an arithmetic number, because the mean of its divisors is an integer number (1718190990936).

Almost surely, 2^{21000112111110} is an apocalyptic number.

21000112111110 is an abundant number, since it is smaller than the sum of its proper divisors (33981999598842).

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

21000112111110 is a wasteful number, since it uses less digits than its factorization.

21000112111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63636703388.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21000112111110 its reverse (1111121100012), we get a palindrome (22111233211122).

The spelling of 21000112111110 in words is "twenty-one trillion, one hundred twelve million, one hundred eleven thousand, one hundred ten".