21231365336252 has 24 divisors (see below), whose sum is σ = 37578204112512. Its totient is φ = 10495401966000.

The previous prime is 21231365336227. The next prime is 21231365336257. The reversal of 21231365336252 is 25263356313212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231365336257) 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, 83169398 + ... + 83424285.

It is an arithmetic number, because the mean of its divisors is an integer number (1565758504688).

Almost surely, 2^{21231365336252} is an apocalyptic number.

It is an amenable number.

21231365336252 is a deficient number, since it is larger than the sum of its proper divisors (16346838776260).

21231365336252 is a wasteful number, since it uses less digits than its factorization.

21231365336252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166594049 (or 166594047 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 44.

The spelling of 21231365336252 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred sixty-five million, three hundred thirty-six thousand, two hundred fifty-two".