201231312003947 has 2 divisors, whose sum is σ = 201231312003948. Its totient is φ = 201231312003946.

The previous prime is 201231312003937. The next prime is 201231312004003. The reversal of 201231312003947 is 749300213132102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201231312003947 - 2⁸ = 201231312003691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201231312003947.

It is not a weakly prime, because it can be changed into another prime (201231312003907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100615656001973 + 100615656001974.

It is an arithmetic number, because the mean of its divisors is an integer number (100615656001974).

Almost surely, 2^{201231312003947} is an apocalyptic number.

201231312003947 is a deficient number, since it is larger than the sum of its proper divisors (1).

201231312003947 is an equidigital number, since it uses as much as digits as its factorization.

201231312003947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 201231312003947 in words is "two hundred one trillion, two hundred thirty-one billion, three hundred twelve million, three thousand, nine hundred forty-seven".