13120313220 has 144 divisors (see below), whose sum is σ = 46713209088. Its totient is φ = 2917866240.

The previous prime is 13120313147. The next prime is 13120313263. The reversal of 13120313220 is 2231302131.

13120313220 is a `hidden beast` number, since 1 + 312 + 0 + 31 + 322 + 0 = 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 = 13120313193 and 13120313202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94096 + ... + 187335.

Almost surely, 2^13120313220 is an apocalyptic number.

13120313220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13120313220 is an abundant number, since it is smaller than the sum of its proper divisors (33592895868).

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

13120313220 is a wasteful number, since it uses less digits than its factorization.

13120313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281490 (or 281485 counting only the distinct ones).

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

Adding to 13120313220 its reverse (2231302131), we get a palindrome (15351615351).

The spelling of 13120313220 in words is "thirteen billion, one hundred twenty million, three hundred thirteen thousand, two hundred twenty".