21202100112 has 20 divisors (see below), whose sum is σ = 54772092080. Its totient is φ = 7067366688.

The previous prime is 21202100099. The next prime is 21202100123. The reversal of 21202100112 is 21100120212.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 220855162 + ... + 220855257.

It is an arithmetic number, because the mean of its divisors is an integer number (2738604604).

Almost surely, 2^21202100112 is an apocalyptic number.

It is an amenable number.

21202100112 is an abundant number, since it is smaller than the sum of its proper divisors (33569991968).

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

21202100112 is a wasteful number, since it uses less digits than its factorization.

21202100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441710430 (or 441710424 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21202100112 its reverse (21100120212), we get a palindrome (42302220324).

The spelling of 21202100112 in words is "twenty-one billion, two hundred two million, one hundred thousand, one hundred twelve".