121293955691 has 4 divisors (see below), whose sum is σ = 121295617872. Its totient is φ = 121292293512.

The previous prime is 121293955687. The next prime is 121293955709. The reversal of 121293955691 is 196559392121.

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 121293955691 - 2² = 121293955687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121293955891) 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, 716351 + ... + 869336.

It is an arithmetic number, because the mean of its divisors is an integer number (30323904468).

Almost surely, 2^121293955691 is an apocalyptic number.

121293955691 is a deficient number, since it is larger than the sum of its proper divisors (1662181).

121293955691 is an equidigital number, since it uses as much as digits as its factorization.

121293955691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662180.

The product of its digits is 1312200, while the sum is 53.

The spelling of 121293955691 in words is "one hundred twenty-one billion, two hundred ninety-three million, nine hundred fifty-five thousand, six hundred ninety-one".