21201232302 has 64 divisors (see below), whose sum is σ = 48284712960. Its totient is φ = 6891962112.

The previous prime is 21201232271. The next prime is 21201232313. The reversal of 21201232302 is 20323210212.

It is a super-2 number, since 2×21201232302² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1555923 + ... + 1569489.

It is an arithmetic number, because the mean of its divisors is an integer number (754448640).

Almost surely, 2^21201232302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21201232302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24142356480).

21201232302 is an abundant number, since it is smaller than the sum of its proper divisors (27083480658).

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

21201232302 is a wasteful number, since it uses less digits than its factorization.

21201232302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14294 (or 14288 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21201232302 its reverse (20323210212), we get a palindrome (41524442514).

The spelling of 21201232302 in words is "twenty-one billion, two hundred one million, two hundred thirty-two thousand, three hundred two".