21101202112112 has 40 divisors (see below), whose sum is σ = 43284105748560. Its totient is φ = 9937529902080.

The previous prime is 21101202112031. The next prime is 21101202112163. The reversal of 21101202112112 is 21121120210112.

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, 200559689 + ... + 200664872.

It is an arithmetic number, because the mean of its divisors is an integer number (1082102643714).

Almost surely, 2^{21101202112112} is an apocalyptic number.

It is an amenable number.

21101202112112 is an abundant number, since it is smaller than the sum of its proper divisors (22182903636448).

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

21101202112112 is a wasteful number, since it uses less digits than its factorization.

21101202112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401224761 (or 401224755 counting only the distinct ones).

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

Adding to 21101202112112 its reverse (21121120210112), we get a palindrome (42222322322224).

The spelling of 21101202112112 in words is "twenty-one trillion, one hundred one billion, two hundred two million, one hundred twelve thousand, one hundred twelve".