21010111021112 has 16 divisors (see below), whose sum is σ = 39426434652840. Its totient is φ = 10496395113696.

The previous prime is 21010111021091. The next prime is 21010111021121. The reversal of 21010111021112 is 21112011101012.

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, 1082539298 + ... + 1082558705.

Almost surely, 2^{21010111021112} is an apocalyptic number.

It is an amenable number.

21010111021112 is a deficient number, since it is larger than the sum of its proper divisors (18416323631728).

21010111021112 is a wasteful number, since it uses less digits than its factorization.

21010111021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165099222 (or 2165099218 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21010111021112 its reverse (21112011101012), we get a palindrome (42122122122124).

The spelling of 21010111021112 in words is "twenty-one trillion, ten billion, one hundred eleven million, twenty-one thousand, one hundred twelve".