21231010308 has 24 divisors (see below), whose sum is σ = 49553728000. Its totient is φ = 7074902880.

The previous prime is 21231010291. The next prime is 21231010309. The reversal of 21231010308 is 80301013212.

It is not an unprimeable number, because it can be changed into a prime (21231010309) 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, 220183 + ... + 301566.

Almost surely, 2^21231010308 is an apocalyptic number.

It is an amenable number.

21231010308 is an abundant number, since it is smaller than the sum of its proper divisors (28322717692).

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

21231010308 is a wasteful number, since it uses less digits than its factorization.

21231010308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525147 (or 525145 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 21231010308 in words is "twenty-one billion, two hundred thirty-one million, ten thousand, three hundred eight".