1091957093131 has 4 divisors (see below), whose sum is σ = 1095197322232. Its totient is φ = 1088716864032.

The previous prime is 1091957093093. The next prime is 1091957093159. The reversal of 1091957093131 is 1313907591901.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1091957093131 is a prime.

It is a super-2 number, since 2×1091957093131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091957099131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620114045 + ... + 1620114718.

It is an arithmetic number, because the mean of its divisors is an integer number (273799330558).

Almost surely, 2^{1091957093131} is an apocalyptic number.

1091957093131 is a deficient number, since it is larger than the sum of its proper divisors (3240229101).

1091957093131 is an equidigital number, since it uses as much as digits as its factorization.

1091957093131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240229100.

The product of its (nonzero) digits is 229635, while the sum is 49.

The spelling of 1091957093131 in words is "one trillion, ninety-one billion, nine hundred fifty-seven million, ninety-three thousand, one hundred thirty-one".