121221234179 has 2 divisors, whose sum is σ = 121221234180. Its totient is φ = 121221234178.

The previous prime is 121221234163. The next prime is 121221234181. The reversal of 121221234179 is 971432122121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121221234179 - 2⁴ = 121221234163 is a prime.

Together with 121221234181, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121221234779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610617089 + 60610617090.

It is an arithmetic number, because the mean of its divisors is an integer number (60610617090).

Almost surely, 2^121221234179 is an apocalyptic number.

121221234179 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221234179 is an equidigital number, since it uses as much as digits as its factorization.

121221234179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The spelling of 121221234179 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred thirty-four thousand, one hundred seventy-nine".