121191323 has 16 divisors (see below), whose sum is σ = 135690720. Its totient is φ = 107308800.

The previous prime is 121191313. The next prime is 121191331. The reversal of 121191323 is 323191121.

It is a cyclic number.

It is not a de Polignac number, because 121191323 - 2²⁰ = 120142747 is a prime.

It is a super-3 number, since 3×121191323³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121191313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72311 + ... + 73967.

It is an arithmetic number, because the mean of its divisors is an integer number (8480670).

Almost surely, 2^121191323 is an apocalyptic number.

121191323 is a deficient number, since it is larger than the sum of its proper divisors (14499397).

121191323 is a wasteful number, since it uses less digits than its factorization.

121191323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838.

The product of its digits is 324, while the sum is 23.

The square root of 121191323 is about 11008.6930650282. The cubic root of 121191323 is about 494.8692958312.

The spelling of 121191323 in words is "one hundred twenty-one million, one hundred ninety-one thousand, three hundred twenty-three".