131121123191 has 2 divisors, whose sum is σ = 131121123192. Its totient is φ = 131121123190.

The previous prime is 131121123167. The next prime is 131121123277. The reversal of 131121123191 is 191321121131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131121123191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131121123191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131121123121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65560561595 + 65560561596.

It is an arithmetic number, because the mean of its divisors is an integer number (65560561596).

Almost surely, 2^131121123191 is an apocalyptic number.

131121123191 is a deficient number, since it is larger than the sum of its proper divisors (1).

131121123191 is an equidigital number, since it uses as much as digits as its factorization.

131121123191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 26.

The spelling of 131121123191 in words is "one hundred thirty-one billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred ninety-one".