131213333231 has 2 divisors, whose sum is σ = 131213333232. Its totient is φ = 131213333230.

The previous prime is 131213333227. The next prime is 131213333267. The reversal of 131213333231 is 132333312131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131213333231 - 2² = 131213333227 is a prime.

It is a super-2 number, since 2×131213333231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131213333231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131213333431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65606666615 + 65606666616.

It is an arithmetic number, because the mean of its divisors is an integer number (65606666616).

Almost surely, 2^131213333231 is an apocalyptic number.

131213333231 is a deficient number, since it is larger than the sum of its proper divisors (1).

131213333231 is an equidigital number, since it uses as much as digits as its factorization.

131213333231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 26.

Adding to 131213333231 its reverse (132333312131), we get a palindrome (263546645362).

The spelling of 131213333231 in words is "one hundred thirty-one billion, two hundred thirteen million, three hundred thirty-three thousand, two hundred thirty-one".