11420123191 has 2 divisors, whose sum is σ = 11420123192. Its totient is φ = 11420123190.

The previous prime is 11420123177. The next prime is 11420123243. The reversal of 11420123191 is 19132102411.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11420123191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11420123111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710061595 + 5710061596.

It is an arithmetic number, because the mean of its divisors is an integer number (5710061596).

Almost surely, 2^11420123191 is an apocalyptic number.

11420123191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11420123191 is an equidigital number, since it uses as much as digits as its factorization.

11420123191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 11420123191 in words is "eleven billion, four hundred twenty million, one hundred twenty-three thousand, one hundred ninety-one".