121544024491 has 2 divisors, whose sum is σ = 121544024492. Its totient is φ = 121544024490.

The previous prime is 121544024447. The next prime is 121544024531. The reversal of 121544024491 is 194420445121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121544024491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121544024491.

It is not a weakly prime, because it can be changed into another prime (121544024191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60772012245 + 60772012246.

It is an arithmetic number, because the mean of its divisors is an integer number (60772012246).

Almost surely, 2^121544024491 is an apocalyptic number.

121544024491 is a deficient number, since it is larger than the sum of its proper divisors (1).

121544024491 is an equidigital number, since it uses as much as digits as its factorization.

121544024491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 121544024491 in words is "one hundred twenty-one billion, five hundred forty-four million, twenty-four thousand, four hundred ninety-one".