13131211020 has 48 divisors (see below), whose sum is σ = 38035236960. Its totient is φ = 3380909056.

The previous prime is 13131211003. The next prime is 13131211099. The reversal of 13131211020 is 2011213131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3771597 + ... + 3775076.

It is an arithmetic number, because the mean of its divisors is an integer number (792400770).

Almost surely, 2^13131211020 is an apocalyptic number.

13131211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13131211020 is an abundant number, since it is smaller than the sum of its proper divisors (24904025940).

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

13131211020 is a wasteful number, since it uses less digits than its factorization.

13131211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7546714 (or 7546712 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 13131211020 its reverse (2011213131), we get a palindrome (15142424151).

The spelling of 13131211020 in words is "thirteen billion, one hundred thirty-one million, two hundred eleven thousand, twenty".