31311320303111 has 2 divisors, whose sum is σ = 31311320303112. Its totient is φ = 31311320303110.

The previous prime is 31311320303099. The next prime is 31311320303129. The reversal of 31311320303111 is 11130302311313.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31311320303111 is a prime.

It is a super-2 number, since 2×31311320303111² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31311320308111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655660151555 + 15655660151556.

It is an arithmetic number, because the mean of its divisors is an integer number (15655660151556).

Almost surely, 2^{31311320303111} is an apocalyptic number.

31311320303111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311320303111 is an equidigital number, since it uses as much as digits as its factorization.

31311320303111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 31311320303111 its reverse (11130302311313), we get a palindrome (42441622614424).

The spelling of 31311320303111 in words is "thirty-one trillion, three hundred eleven billion, three hundred twenty million, three hundred three thousand, one hundred eleven".