2131312100873 has 2 divisors, whose sum is σ = 2131312100874. Its totient is φ = 2131312100872.

The previous prime is 2131312100807. The next prime is 2131312100887. The reversal of 2131312100873 is 3780012131312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1765464949264 + 365847151609 = 1328708^2 + 604853^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131312100873 - 2¹⁰ = 2131312099849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2131312103873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065656050436 + 1065656050437.

It is an arithmetic number, because the mean of its divisors is an integer number (1065656050437).

Almost surely, 2^{2131312100873} is an apocalyptic number.

It is an amenable number.

2131312100873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131312100873 is an equidigital number, since it uses as much as digits as its factorization.

2131312100873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 2131312100873 in words is "two trillion, one hundred thirty-one billion, three hundred twelve million, one hundred thousand, eight hundred seventy-three".