2131121312291 has 8 divisors (see below), whose sum is σ = 2136660328320. Its totient is φ = 2125585141632.

The previous prime is 2131121312263. The next prime is 2131121312371. The reversal of 2131121312291 is 1922131211312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131121312291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131121312891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792686 + ... + 2211468.

It is an arithmetic number, because the mean of its divisors is an integer number (267082541040).

Almost surely, 2^{2131121312291} is an apocalyptic number.

2131121312291 is a deficient number, since it is larger than the sum of its proper divisors (5539016029).

2131121312291 is a wasteful number, since it uses less digits than its factorization.

2131121312291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422685.

The product of its digits is 1296, while the sum is 29.

The spelling of 2131121312291 in words is "two trillion, one hundred thirty-one billion, one hundred twenty-one million, three hundred twelve thousand, two hundred ninety-one".