121271305697 has 4 divisors (see below), whose sum is σ = 122472011796. Its totient is φ = 120070599600.

The previous prime is 121271305667. The next prime is 121271305721. The reversal of 121271305697 is 796503172121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796503172121 = 101 ⋅7886170021.

It can be written as a sum of positive squares in 2 ways, for example, as 114308905216 + 6962400481 = 338096^2 + 83441^2 .

It is a cyclic number.

It is not a de Polignac number, because 121271305697 - 2⁶ = 121271305633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121271305627) 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, 600352898 + ... + 600353099.

It is an arithmetic number, because the mean of its divisors is an integer number (30618002949).

Almost surely, 2^121271305697 is an apocalyptic number.

It is an amenable number.

121271305697 is a deficient number, since it is larger than the sum of its proper divisors (1200706099).

121271305697 is a wasteful number, since it uses less digits than its factorization.

121271305697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200706098.

The product of its (nonzero) digits is 158760, while the sum is 44.

The spelling of 121271305697 in words is "one hundred twenty-one billion, two hundred seventy-one million, three hundred five thousand, six hundred ninety-seven".