21202302312012 has 48 divisors (see below), whose sum is σ = 51217430916960. Its totient is φ = 6818468170752.

The previous prime is 21202302312007. The next prime is 21202302312029. The reversal of 21202302312012 is 21021320320212.

It is a self number, because there is not a number n which added to its sum of digits gives 21202302312012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23035983 + ... + 23938694.

It is an arithmetic number, because the mean of its divisors is an integer number (1067029810770).

Almost surely, 2^{21202302312012} is an apocalyptic number.

It is an amenable number.

21202302312012 is an abundant number, since it is smaller than the sum of its proper divisors (30015128604948).

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

21202302312012 is a wasteful number, since it uses less digits than its factorization.

21202302312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46976010 (or 46976008 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21202302312012 its reverse (21021320320212), we get a palindrome (42223622632224).

The spelling of 21202302312012 in words is "twenty-one trillion, two hundred two billion, three hundred two million, three hundred twelve thousand, twelve".