82191494121 has 32 divisors (see below), whose sum is σ = 122831078400. Its totient is φ = 48447506880.

The previous prime is 82191494117. The next prime is 82191494153. The reversal of 82191494121 is 12149419128.

It is not a de Polignac number, because 82191494121 - 2² = 82191494117 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82191499121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3430060 + ... + 3453938.

It is an arithmetic number, because the mean of its divisors is an integer number (3838471200).

Almost surely, 2^82191494121 is an apocalyptic number.

It is an amenable number.

82191494121 is a deficient number, since it is larger than the sum of its proper divisors (40639584279).

82191494121 is a wasteful number, since it uses less digits than its factorization.

82191494121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26749.

The product of its digits is 41472, while the sum is 42.

The spelling of 82191494121 in words is "eighty-two billion, one hundred ninety-one million, four hundred ninety-four thousand, one hundred twenty-one".