31131121367 has 2 divisors, whose sum is σ = 31131121368. Its totient is φ = 31131121366.

The previous prime is 31131121279. The next prime is 31131121369. The reversal of 31131121367 is 76312113113.

It is a strong prime.

It is an emirp because it is prime and its reverse (76312113113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31131121367 - 2²⁶ = 31064012503 is a prime.

Together with 31131121369, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31131121369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565560683 + 15565560684.

It is an arithmetic number, because the mean of its divisors is an integer number (15565560684).

Almost surely, 2^31131121367 is an apocalyptic number.

31131121367 is a deficient number, since it is larger than the sum of its proper divisors (1).

31131121367 is an equidigital number, since it uses as much as digits as its factorization.

31131121367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The spelling of 31131121367 in words is "thirty-one billion, one hundred thirty-one million, one hundred twenty-one thousand, three hundred sixty-seven".