21010012332 has 12 divisors (see below), whose sum is σ = 49023362136. Its totient is φ = 7003337440.

The previous prime is 21010012321. The next prime is 21010012339. The reversal of 21010012332 is 23321001012.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (21010012339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875417169 + ... + 875417192.

It is an arithmetic number, because the mean of its divisors is an integer number (4085280178).

Almost surely, 2^21010012332 is an apocalyptic number.

It is an amenable number.

21010012332 is an abundant number, since it is smaller than the sum of its proper divisors (28013349804).

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

21010012332 is a wasteful number, since it uses less digits than its factorization.

21010012332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750834368 (or 1750834366 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21010012332 its reverse (23321001012), we get a palindrome (44331013344).

The spelling of 21010012332 in words is "twenty-one billion, ten million, twelve thousand, three hundred thirty-two".