1201316157391 has 4 divisors (see below), whose sum is σ = 1372932751312. Its totient is φ = 1029699563472.

The previous prime is 1201316157359. The next prime is 1201316157397. The reversal of 1201316157391 is 1937516131021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201316157391 - 2⁵ = 1201316157359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201316157397) 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, 85808296950 + ... + 85808296963.

It is an arithmetic number, because the mean of its divisors is an integer number (343233187828).

Almost surely, 2^{1201316157391} is an apocalyptic number.

1201316157391 is a deficient number, since it is larger than the sum of its proper divisors (171616593921).

1201316157391 is an equidigital number, since it uses as much as digits as its factorization.

1201316157391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171616593920.

The product of its (nonzero) digits is 34020, while the sum is 40.

The spelling of 1201316157391 in words is "one trillion, two hundred one billion, three hundred sixteen million, one hundred fifty-seven thousand, three hundred ninety-one".