121321879 has 16 divisors (see below), whose sum is σ = 143534080. Its totient is φ = 100349280.

The previous prime is 121321873. The next prime is 121321891. The reversal of 121321879 is 978123121.

It is a cyclic number.

It is not a de Polignac number, because 121321879 - 2¹⁹ = 120797591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321873) 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, 112957 + ... + 114025.

It is an arithmetic number, because the mean of its divisors is an integer number (8970880).

Almost surely, 2^121321879 is an apocalyptic number.

121321879 is a deficient number, since it is larger than the sum of its proper divisors (22212201).

121321879 is a wasteful number, since it uses less digits than its factorization.

121321879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630.

The product of its digits is 6048, while the sum is 34.

The square root of 121321879 is about 11014.6211464580. The cubic root of 121321879 is about 495.0469349775.

The spelling of 121321879 in words is "one hundred twenty-one million, three hundred twenty-one thousand, eight hundred seventy-nine".