21231201292 has 12 divisors (see below), whose sum is σ = 42462402640. Its totient is φ = 9099086256.

The previous prime is 21231201283. The next prime is 21231201301. The reversal of 21231201292 is 29210213212.

It is an interprime number because it is at equal distance from previous prime (21231201283) and next prime (21231201301).

21231201292 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379128567 + ... + 379128622.

Almost surely, 2^21231201292 is an apocalyptic number.

It is an amenable number.

21231201292 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21231201292 is a wasteful number, since it uses less digits than its factorization.

21231201292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758257200 (or 758257198 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 21231201292 in words is "twenty-one billion, two hundred thirty-one million, two hundred one thousand, two hundred ninety-two".