21312300022 has 16 divisors (see below), whose sum is σ = 34698650112. Its totient is φ = 9758992320.

The previous prime is 21312300007. The next prime is 21312300049. The reversal of 21312300022 is 22000321312.

It is a junction number, because it is equal to n+sod(n) for n = 21312299969 and 21312300005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3223879 + ... + 3230482.

It is an arithmetic number, because the mean of its divisors is an integer number (2168665632).

Almost surely, 2^21312300022 is an apocalyptic number.

21312300022 is a deficient number, since it is larger than the sum of its proper divisors (13386350090).

21312300022 is a wasteful number, since it uses less digits than its factorization.

21312300022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6454503.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21312300022 its reverse (22000321312), we get a palindrome (43312621334).

The spelling of 21312300022 in words is "twenty-one billion, three hundred twelve million, three hundred thousand, twenty-two".