31121303111 has 2 divisors, whose sum is σ = 31121303112. Its totient is φ = 31121303110.

The previous prime is 31121303053. The next prime is 31121303119. The reversal of 31121303111 is 11130312113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31121303111 - 2⁶ = 31121303047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31121303111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31121303119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560651555 + 15560651556.

It is an arithmetic number, because the mean of its divisors is an integer number (15560651556).

Almost surely, 2^31121303111 is an apocalyptic number.

31121303111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31121303111 is an equidigital number, since it uses as much as digits as its factorization.

31121303111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31121303111 its reverse (11130312113), we get a palindrome (42251615224).

The spelling of 31121303111 in words is "thirty-one billion, one hundred twenty-one million, three hundred three thousand, one hundred eleven".