21210201220112 has 40 divisors (see below), whose sum is σ = 42887181312576. Its totient is φ = 10142663839616.

The previous prime is 21210201220111. The next prime is 21210201220141. The reversal of 21210201220112 is 21102210201212.

It is not an unprimeable number, because it can be changed into a prime (21210201220111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041203 + ... + 6595794.

Almost surely, 2^{21210201220112} is an apocalyptic number.

It is an amenable number.

21210201220112 is an abundant number, since it is smaller than the sum of its proper divisors (21676980092464).

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

21210201220112 is a wasteful number, since it uses less digits than its factorization.

21210201220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7644575 (or 7644569 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21210201220112 its reverse (21102210201212), we get a palindrome (42312411421324).

The spelling of 21210201220112 in words is "twenty-one trillion, two hundred ten billion, two hundred one million, two hundred twenty thousand, one hundred twelve".