21010111222112 has 48 divisors (see below), whose sum is σ = 41475031395840. Its totient is φ = 10476774392832.

The previous prime is 21010111222073. The next prime is 21010111222127. The reversal of 21010111222112 is 21122211101012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166777964 + ... + 166903892.

It is an arithmetic number, because the mean of its divisors is an integer number (864063154080).

Almost surely, 2^{21010111222112} is an apocalyptic number.

It is an amenable number.

21010111222112 is a deficient number, since it is larger than the sum of its proper divisors (20464920173728).

21010111222112 is a wasteful number, since it uses less digits than its factorization.

21010111222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139935 (or 139927 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21010111222112 its reverse (21122211101012), we get a palindrome (42132322323124).

The spelling of 21010111222112 in words is "twenty-one trillion, ten billion, one hundred eleven million, two hundred twenty-two thousand, one hundred twelve".