121131124190999 has 16 divisors (see below), whose sum is σ = 134989565212320. Its totient is φ = 107923773444480.

The previous prime is 121131124190917. The next prime is 121131124191013. The reversal of 121131124190999 is 999091421131121.

It is not a de Polignac number, because 121131124190999 - 2⁸ = 121131124190743 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 121131124190999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121131124190099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49304177 + ... + 51702650.

It is an arithmetic number, because the mean of its divisors is an integer number (8436847825770).

Almost surely, 2^{121131124190999} is an apocalyptic number.

121131124190999 is a deficient number, since it is larger than the sum of its proper divisors (13858441021321).

121131124190999 is a wasteful number, since it uses less digits than its factorization.

121131124190999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101010050.

The product of its (nonzero) digits is 314928, while the sum is 53.

The spelling of 121131124190999 in words is "one hundred twenty-one trillion, one hundred thirty-one billion, one hundred twenty-four million, one hundred ninety thousand, nine hundred ninety-nine".