13021320231220 has 24 divisors (see below), whose sum is σ = 31251168555264. Its totient is φ = 4464452650656.

The previous prime is 13021320231209. The next prime is 13021320231341. The reversal of 13021320231220 is 2213202312031.

It is a junction number, because it is equal to n+sod(n) for n = 13021320231191 and 13021320231200.

It is a congruent number.

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, 46504714972 + ... + 46504715251.

It is an arithmetic number, because the mean of its divisors is an integer number (1302132023136).

Almost surely, 2^{13021320231220} is an apocalyptic number.

13021320231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13021320231220 is an abundant number, since it is smaller than the sum of its proper divisors (18229848324044).

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

13021320231220 is a wasteful number, since it uses less digits than its factorization.

13021320231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93009430239 (or 93009430237 counting only the distinct ones).

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

Adding to 13021320231220 its reverse (2213202312031), we get a palindrome (15234522543251).

The spelling of 13021320231220 in words is "thirteen trillion, twenty-one billion, three hundred twenty million, two hundred thirty-one thousand, two hundred twenty".