21201312360 has 64 divisors (see below), whose sum is σ = 63613512000. Its totient is φ = 5652832256.

The previous prime is 21201312311. The next prime is 21201312361. The reversal of 21201312360 is 6321310212.

It is not an unprimeable number, because it can be changed into a prime (21201312361) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1541032 + ... + 1554728.

It is an arithmetic number, because the mean of its divisors is an integer number (993961125).

Almost surely, 2^21201312360 is an apocalyptic number.

21201312360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201312360 is an abundant number, since it is smaller than the sum of its proper divisors (42412199640).

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

21201312360 is a wasteful number, since it uses less digits than its factorization.

21201312360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26610 (or 26606 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21201312360 its reverse (6321310212), we get a palindrome (27522622572).

The spelling of 21201312360 in words is "twenty-one billion, two hundred one million, three hundred twelve thousand, three hundred sixty".