12231021524 has 6 divisors (see below), whose sum is σ = 21404287674. Its totient is φ = 6115510760.

The previous prime is 12231021499. The next prime is 12231021533. The reversal of 12231021524 is 42512013221.

It can be written as a sum of positive squares in only one way, i.e., 12016105924 + 214915600 = 109618^2 + 14660^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12231021524.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1528877687 + ... + 1528877694.

It is an arithmetic number, because the mean of its divisors is an integer number (3567381279).

Almost surely, 2^12231021524 is an apocalyptic number.

It is an amenable number.

12231021524 is a deficient number, since it is larger than the sum of its proper divisors (9173266150).

12231021524 is a wasteful number, since it uses less digits than its factorization.

12231021524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057755385 (or 3057755383 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12231021524 its reverse (42512013221), we get a palindrome (54743034745).

The spelling of 12231021524 in words is "twelve billion, two hundred thirty-one million, twenty-one thousand, five hundred twenty-four".