121931241 has 4 divisors (see below), whose sum is σ = 162574992. Its totient is φ = 81287492.

The previous prime is 121931237. The next prime is 121931261. The reversal of 121931241 is 142139121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121931241 - 2² = 121931237 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121931221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20321871 + ... + 20321876.

It is an arithmetic number, because the mean of its divisors is an integer number (40643748).

Almost surely, 2^121931241 is an apocalyptic number.

It is an amenable number.

121931241 is a deficient number, since it is larger than the sum of its proper divisors (40643751).

121931241 is an equidigital number, since it uses as much as digits as its factorization.

121931241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40643750.

The product of its digits is 432, while the sum is 24.

The square root of 121931241 is about 11042.2480048222. The cubic root of 121931241 is about 495.8743733718.

The spelling of 121931241 in words is "one hundred twenty-one million, nine hundred thirty-one thousand, two hundred forty-one".