21301012032 has 56 divisors (see below), whose sum is σ = 56383732800. Its totient is φ = 7097212416.

The previous prime is 21301012027. The next prime is 21301012037. The reversal of 21301012032 is 23021010312.

It is an interprime number because it is at equal distance from previous prime (21301012027) and next prime (21301012037).

It is a super-2 number, since 2×21301012032² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21301012037) 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, 435469 + ... + 481907.

Almost surely, 2^21301012032 is an apocalyptic number.

It is an amenable number.

21301012032 is an abundant number, since it is smaller than the sum of its proper divisors (35082720768).

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

21301012032 is a wasteful number, since it uses less digits than its factorization.

21301012032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48843 (or 48833 counting only the distinct ones).

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

Adding to 21301012032 its reverse (23021010312), we get a palindrome (44322022344).

The spelling of 21301012032 in words is "twenty-one billion, three hundred one million, twelve thousand, thirty-two".