121391079 has 8 divisors (see below), whose sum is σ = 168892032. Its totient is φ = 77408760.

The previous prime is 121391077. The next prime is 121391093. The reversal of 121391079 is 970193121.

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

It is not a de Polignac number, because 121391079 - 2¹ = 121391077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121391077) 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 7 ways as a sum of consecutive naturals, for example, 879577 + ... + 879714.

It is an arithmetic number, because the mean of its divisors is an integer number (21111504).

Almost surely, 2^121391079 is an apocalyptic number.

121391079 is a deficient number, since it is larger than the sum of its proper divisors (47500953).

121391079 is a wasteful number, since it uses less digits than its factorization.

121391079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759317.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 121391079 is about 11017.7619778247. The cubic root of 121391079 is about 495.1410392918.

The spelling of 121391079 in words is "one hundred twenty-one million, three hundred ninety-one thousand, seventy-nine".