12225732021 has 12 divisors (see below), whose sum is σ = 17668019148. Its totient is φ = 8146505664.

The previous prime is 12225731989. The next prime is 12225732031. The reversal of 12225732021 is 12023752221.

It can be written as a sum of positive squares in 2 ways, for example, as 2783723121 + 9442008900 = 52761^2 + 97170^2 .

It is not a de Polignac number, because 12225732021 - 2⁵ = 12225731989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225732031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312360 + ... + 349313.

It is an arithmetic number, because the mean of its divisors is an integer number (1472334929).

Almost surely, 2^12225732021 is an apocalyptic number.

It is an amenable number.

12225732021 is a deficient number, since it is larger than the sum of its proper divisors (5442287127).

12225732021 is a wasteful number, since it uses less digits than its factorization.

12225732021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663732 (or 663729 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The spelling of 12225732021 in words is "twelve billion, two hundred twenty-five million, seven hundred thirty-two thousand, twenty-one".