2131315988111 has 2 divisors, whose sum is σ = 2131315988112. Its totient is φ = 2131315988110.

The previous prime is 2131315988107. The next prime is 2131315988159. The reversal of 2131315988111 is 1118895131312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131315988111 - 2² = 2131315988107 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131315988161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065657994055 + 1065657994056.

It is an arithmetic number, because the mean of its divisors is an integer number (1065657994056).

Almost surely, 2^{2131315988111} is an apocalyptic number.

2131315988111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131315988111 is an equidigital number, since it uses as much as digits as its factorization.

2131315988111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 44.

The spelling of 2131315988111 in words is "two trillion, one hundred thirty-one billion, three hundred fifteen million, nine hundred eighty-eight thousand, one hundred eleven".