21111212200112 has 10 divisors (see below), whose sum is σ = 40902973637748. Its totient is φ = 10555606100048.

The previous prime is 21111212200109. The next prime is 21111212200139. The reversal of 21111212200112 is 21100221211112.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659725381238 + ... + 659725381269.

Almost surely, 2^{21111212200112} is an apocalyptic number.

It is an amenable number.

21111212200112 is a deficient number, since it is larger than the sum of its proper divisors (19791761437636).

21111212200112 is a wasteful number, since it uses less digits than its factorization.

21111212200112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319450762515 (or 1319450762509 counting only the distinct ones).

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

Adding to 21111212200112 its reverse (21100221211112), we get a palindrome (42211433411224).

The spelling of 21111212200112 in words is "twenty-one trillion, one hundred eleven billion, two hundred twelve million, two hundred thousand, one hundred twelve".