1201331311993 has 4 divisors (see below), whose sum is σ = 1201423727988. Its totient is φ = 1201238896000.

The previous prime is 1201331311891. The next prime is 1201331312017. The reversal of 1201331311993 is 3991131331021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 475013180944 + 726318131049 = 689212^2 + 852243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201331311993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201331311793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46188496 + ... + 46214497.

It is an arithmetic number, because the mean of its divisors is an integer number (300355931997).

Almost surely, 2^{1201331311993} is an apocalyptic number.

It is an amenable number.

1201331311993 is a deficient number, since it is larger than the sum of its proper divisors (92415995).

1201331311993 is an equidigital number, since it uses as much as digits as its factorization.

1201331311993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92415994.

The product of its (nonzero) digits is 13122, while the sum is 37.

The spelling of 1201331311993 in words is "one trillion, two hundred one billion, three hundred thirty-one million, three hundred eleven thousand, nine hundred ninety-three".