13212020131 has 4 divisors (see below), whose sum is σ = 13291134192. Its totient is φ = 13132906072.

The previous prime is 13212020069. The next prime is 13212020137. The reversal of 13212020131 is 13102021231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13212020131 - 2¹⁵ = 13211987363 is a prime.

It is a super-2 number, since 2×13212020131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13212020137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39556780 + ... + 39557113.

It is an arithmetic number, because the mean of its divisors is an integer number (3322783548).

Almost surely, 2^13212020131 is an apocalyptic number.

13212020131 is a deficient number, since it is larger than the sum of its proper divisors (79114061).

13212020131 is an equidigital number, since it uses as much as digits as its factorization.

13212020131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79114060.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13212020131 its reverse (13102021231), we get a palindrome (26314041362).

It can be divided in two parts, 132120 and 20131, that added together give a palindrome (152251).

The spelling of 13212020131 in words is "thirteen billion, two hundred twelve million, twenty thousand, one hundred thirty-one".