31231120313111 has 2 divisors, whose sum is σ = 31231120313112. Its totient is φ = 31231120313110.

The previous prime is 31231120313089. The next prime is 31231120313131. The reversal of 31231120313111 is 11131302113213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31231120313111 - 2⁶ = 31231120313047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31231120313131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615560156555 + 15615560156556.

It is an arithmetic number, because the mean of its divisors is an integer number (15615560156556).

Almost surely, 2^{31231120313111} is an apocalyptic number.

31231120313111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231120313111 is an equidigital number, since it uses as much as digits as its factorization.

31231120313111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 31231120313111 its reverse (11131302113213), we get a palindrome (42362422426324).

The spelling of 31231120313111 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty million, three hundred thirteen thousand, one hundred eleven".