31321112311 has 2 divisors, whose sum is σ = 31321112312. Its totient is φ = 31321112310.

The previous prime is 31321112287. The next prime is 31321112351. The reversal of 31321112311 is 11321112313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31321112311 - 2²³ = 31312723703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31321112351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660556155 + 15660556156.

It is an arithmetic number, because the mean of its divisors is an integer number (15660556156).

Almost surely, 2^31321112311 is an apocalyptic number.

31321112311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321112311 is an equidigital number, since it uses as much as digits as its factorization.

31321112311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 19.

Adding to 31321112311 its reverse (11321112313), we get a palindrome (42642224624).

The spelling of 31321112311 in words is "thirty-one billion, three hundred twenty-one million, one hundred twelve thousand, three hundred eleven".