21312114224 has 40 divisors (see below), whose sum is σ = 42340310880. Its totient is φ = 10386086400.

The previous prime is 21312114193. The next prime is 21312114227. The reversal of 21312114224 is 42241121312.

It is a self number, because there is not a number n which added to its sum of digits gives 21312114224.

It is not an unprimeable number, because it can be changed into a prime (21312114227) 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, 686069 + ... + 716459.

It is an arithmetic number, because the mean of its divisors is an integer number (1058507772).

Almost surely, 2^21312114224 is an apocalyptic number.

It is an amenable number.

21312114224 is a deficient number, since it is larger than the sum of its proper divisors (21028196656).

21312114224 is a wasteful number, since it uses less digits than its factorization.

21312114224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31509 (or 31503 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

Adding to 21312114224 its reverse (42241121312), we get a palindrome (63553235536).

The spelling of 21312114224 in words is "twenty-one billion, three hundred twelve million, one hundred fourteen thousand, two hundred twenty-four".