121808527234091 has 4 divisors (see below), whose sum is σ = 121892014917000. Its totient is φ = 121725039551184.

The previous prime is 121808527234033. The next prime is 121808527234099. The reversal of 121808527234091 is 190432725808121.

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

It is a cyclic number.

It is not a de Polignac number, because 121808527234091 - 2²² = 121808523039787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121808527234099) 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, 41743839266 + ... + 41743842183.

It is an arithmetic number, because the mean of its divisors is an integer number (30473003729250).

Almost surely, 2^{121808527234091} is an apocalyptic number.

121808527234091 is a deficient number, since it is larger than the sum of its proper divisors (83487682909).

121808527234091 is an equidigital number, since it uses as much as digits as its factorization.

121808527234091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83487682908.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 121808527234091 in words is "one hundred twenty-one trillion, eight hundred eight billion, five hundred twenty-seven million, two hundred thirty-four thousand, ninety-one".