121792121 has 8 divisors (see below), whose sum is σ = 133200288. Its totient is φ = 110440000.

The previous prime is 121792117. The next prime is 121792169. The reversal of 121792121 is 121297121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121792121 - 2² = 121792117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121792421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9395 + ... + 18216.

It is an arithmetic number, because the mean of its divisors is an integer number (16650036).

Almost surely, 2^121792121 is an apocalyptic number.

121792121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121792121 is a deficient number, since it is larger than the sum of its proper divisors (11408167).

121792121 is a wasteful number, since it uses less digits than its factorization.

121792121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28023.

The product of its digits is 504, while the sum is 26.

The square root of 121792121 is about 11035.9467650039. The cubic root of 121792121 is about 495.6857088536.

The spelling of 121792121 in words is "one hundred twenty-one million, seven hundred ninety-two thousand, one hundred twenty-one".