13021320323220 has 96 divisors (see below), whose sum is σ = 40145936656896. Its totient is φ = 3127181980800.

The previous prime is 13021320323177. The next prime is 13021320323233. The reversal of 13021320323220 is 2232302312031.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92122246 + ... + 92263485.

It is an arithmetic number, because the mean of its divisors is an integer number (418186840176).

Almost surely, 2^{13021320323220} is an apocalyptic number.

13021320323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13021320323220 is an abundant number, since it is smaller than the sum of its proper divisors (27124616333676).

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

13021320323220 is a wasteful number, since it uses less digits than its factorization.

13021320323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184385861 (or 184385859 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 13021320323220 its reverse (2232302312031), we get a palindrome (15253622635251).

The spelling of 13021320323220 in words is "thirteen trillion, twenty-one billion, three hundred twenty million, three hundred twenty-three thousand, two hundred twenty".