13212320131 has 4 divisors (see below), whose sum is σ = 13329243432. Its totient is φ = 13095396832.

The previous prime is 13212320129. The next prime is 13212320281. The reversal of 13212320131 is 13102321231.

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 13212320131 - 2¹ = 13212320129 is a prime.

It is a super-2 number, since 2×13212320131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13212320099 and 13212320108.

It is not an unprimeable number, because it can be changed into a prime (13212320101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58461481 + ... + 58461706.

It is an arithmetic number, because the mean of its divisors is an integer number (3332310858).

Almost surely, 2^13212320131 is an apocalyptic number.

13212320131 is a deficient number, since it is larger than the sum of its proper divisors (116923301).

13212320131 is a wasteful number, since it uses less digits than its factorization.

13212320131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116923300.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13212320131 its reverse (13102321231), we get a palindrome (26314641362).

The spelling of 13212320131 in words is "thirteen billion, two hundred twelve million, three hundred twenty thousand, one hundred thirty-one".