21224512652456 has 32 divisors (see below), whose sum is σ = 40620917124000. Its totient is φ = 10393605402816.

The previous prime is 21224512652449. The next prime is 21224512652479. The reversal of 21224512652456 is 65425621542212.

It is a self number, because there is not a number n which added to its sum of digits gives 21224512652456.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83455166 + ... + 83709101.

It is an arithmetic number, because the mean of its divisors is an integer number (1269403660125).

Almost surely, 2^{21224512652456} is an apocalyptic number.

It is an amenable number.

21224512652456 is a deficient number, since it is larger than the sum of its proper divisors (19396404471544).

21224512652456 is a wasteful number, since it uses less digits than its factorization.

21224512652456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167164601 (or 167164597 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 47.

The spelling of 21224512652456 in words is "twenty-one trillion, two hundred twenty-four billion, five hundred twelve million, six hundred fifty-two thousand, four hundred fifty-six".