121716364955 has 4 divisors (see below), whose sum is σ = 146059637952. Its totient is φ = 97373091960.

The previous prime is 121716364951. The next prime is 121716364963. The reversal of 121716364955 is 559463617121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121716364955 - 2² = 121716364951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121716364951) 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, 12171636491 + ... + 12171636500.

It is an arithmetic number, because the mean of its divisors is an integer number (36514909488).

Almost surely, 2^121716364955 is an apocalyptic number.

121716364955 is a deficient number, since it is larger than the sum of its proper divisors (24343272997).

121716364955 is an equidigital number, since it uses as much as digits as its factorization.

121716364955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24343272996.

The product of its digits is 1360800, while the sum is 50.

The spelling of 121716364955 in words is "one hundred twenty-one billion, seven hundred sixteen million, three hundred sixty-four thousand, nine hundred fifty-five".