31310031123011 has 2 divisors, whose sum is σ = 31310031123012. Its totient is φ = 31310031123010.

The previous prime is 31310031122969. The next prime is 31310031123013. The reversal of 31310031123011 is 11032113001313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31310031123011 - 2⁶ = 31310031122947 is a prime.

It is a super-2 number, since 2×31310031123011² (a number of 28 digits) contains 22 as substring.

Together with 31310031123013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31310031123013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655015561505 + 15655015561506.

It is an arithmetic number, because the mean of its divisors is an integer number (15655015561506).

Almost surely, 2^{31310031123011} is an apocalyptic number.

31310031123011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31310031123011 is an equidigital number, since it uses as much as digits as its factorization.

31310031123011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 31310031123011 its reverse (11032113001313), we get a palindrome (42342144124324).

The spelling of 31310031123011 in words is "thirty-one trillion, three hundred ten billion, thirty-one million, one hundred twenty-three thousand, eleven".