231313011001999 has 2 divisors, whose sum is σ = 231313011002000. Its totient is φ = 231313011001998.

The previous prime is 231313011001991. The next prime is 231313011002041. The reversal of 231313011001999 is 999100110313132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231313011001999 - 2³ = 231313011001991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231313011001991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115656505500999 + 115656505501000.

It is an arithmetic number, because the mean of its divisors is an integer number (115656505501000).

Almost surely, 2^{231313011001999} is an apocalyptic number.

231313011001999 is a deficient number, since it is larger than the sum of its proper divisors (1).

231313011001999 is an equidigital number, since it uses as much as digits as its factorization.

231313011001999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 43.

The spelling of 231313011001999 in words is "two hundred thirty-one trillion, three hundred thirteen billion, eleven million, one thousand, nine hundred ninety-nine".