21202100122112 has 80 divisors (see below), whose sum is σ = 52138818443712. Its totient is φ = 8387643985920.

The previous prime is 21202100122111. The next prime is 21202100122129. The reversal of 21202100122112 is 21122100120212.

21202100122112 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21202100122112² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21202100122111) 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, 227482814 + ... + 227575997.

Almost surely, 2^{21202100122112} is an apocalyptic number.

It is an amenable number.

21202100122112 is an abundant number, since it is smaller than the sum of its proper divisors (30936718321600).

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

21202100122112 is an equidigital number, since it uses as much as digits as its factorization.

21202100122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455058849 (or 455058833 counting only the distinct ones).

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

Adding to 21202100122112 its reverse (21122100120212), we get a palindrome (42324200242324).

The spelling of 21202100122112 in words is "twenty-one trillion, two hundred two billion, one hundred million, one hundred twenty-two thousand, one hundred twelve".