13231301220 has 72 divisors (see below), whose sum is σ = 40171936896. Its totient is φ = 3525095232.

The previous prime is 13231301203. The next prime is 13231301221. The reversal of 13231301220 is 2210313231.

13231301220 is a `hidden beast` number, since 132 + 313 + 0 + 1 + 220 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 13231301193 and 13231301202.

It is not an unprimeable number, because it can be changed into a prime (13231301221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165219 + ... + 231861.

It is an arithmetic number, because the mean of its divisors is an integer number (557943568).

Almost surely, 2^13231301220 is an apocalyptic number.

13231301220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13231301220 is an abundant number, since it is smaller than the sum of its proper divisors (26940635676).

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

13231301220 is a wasteful number, since it uses less digits than its factorization.

13231301220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67761 (or 67756 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13231301220 its reverse (2210313231), we get a palindrome (15441614451).

The spelling of 13231301220 in words is "thirteen billion, two hundred thirty-one million, three hundred one thousand, two hundred twenty".