21231302102320 has 40 divisors (see below), whose sum is σ = 49367740820400. Its totient is φ = 8491666917120.

The previous prime is 21231302102291. The next prime is 21231302102347. The reversal of 21231302102320 is 2320120313212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 21231302102291 and 21231302102300.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12541666 + ... + 14133505.

It is an arithmetic number, because the mean of its divisors is an integer number (1234193520510).

Almost surely, 2^{21231302102320} is an apocalyptic number.

21231302102320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21231302102320 is an abundant number, since it is smaller than the sum of its proper divisors (28136438718080).

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

21231302102320 is a wasteful number, since it uses less digits than its factorization.

21231302102320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26685133 (or 26685127 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21231302102320 its reverse (2320120313212), we get a palindrome (23551422415532).

The spelling of 21231302102320 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred two million, one hundred two thousand, three hundred twenty".