121447868179 has 4 divisors (see below), whose sum is σ = 132488583480. Its totient is φ = 110407152880.

The previous prime is 121447868149. The next prime is 121447868219. The reversal of 121447868179 is 971868744121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 971868744121 = 11 ⋅88351704011.

It is a cyclic number.

It is not a de Polignac number, because 121447868179 - 2²³ = 121439479571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121447868149) 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, 5520357634 + ... + 5520357655.

It is an arithmetic number, because the mean of its divisors is an integer number (33122145870).

Almost surely, 2^121447868179 is an apocalyptic number.

121447868179 is a deficient number, since it is larger than the sum of its proper divisors (11040715301).

121447868179 is a wasteful number, since it uses less digits than its factorization.

121447868179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11040715300.

The product of its digits is 5419008, while the sum is 58.

The spelling of 121447868179 in words is "one hundred twenty-one billion, four hundred forty-seven million, eight hundred sixty-eight thousand, one hundred seventy-nine".