21202322412 has 48 divisors (see below), whose sum is σ = 53045314560. Its totient is φ = 6567505152.

The previous prime is 21202322387. The next prime is 21202322419. The reversal of 21202322412 is 21422320212.

It is not an unprimeable number, because it can be changed into a prime (21202322419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 641688 + ... + 673919.

It is an arithmetic number, because the mean of its divisors is an integer number (1105110720).

Almost surely, 2^21202322412 is an apocalyptic number.

It is an amenable number.

21202322412 is an abundant number, since it is smaller than the sum of its proper divisors (31842992148).

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

21202322412 is a wasteful number, since it uses less digits than its factorization.

21202322412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315710 (or 1315708 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21202322412 its reverse (21422320212), we get a palindrome (42624642624).

The spelling of 21202322412 in words is "twenty-one billion, two hundred two million, three hundred twenty-two thousand, four hundred twelve".