121321779 has 8 divisors (see below), whose sum is σ = 166134480. Its totient is φ = 78695136.

The previous prime is 121321777. The next prime is 121321789. The reversal of 121321779 is 977123121.

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

It is not a de Polignac number, because 121321779 - 2¹ = 121321777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121321771) 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, 546384 + ... + 546605.

It is an arithmetic number, because the mean of its divisors is an integer number (20766810).

Almost surely, 2^121321779 is an apocalyptic number.

121321779 is a deficient number, since it is larger than the sum of its proper divisors (44812701).

121321779 is a wasteful number, since it uses less digits than its factorization.

121321779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093029.

The product of its digits is 5292, while the sum is 33.

The square root of 121321779 is about 11014.6166070363. The cubic root of 121321779 is about 495.0467989627.

The spelling of 121321779 in words is "one hundred twenty-one million, three hundred twenty-one thousand, seven hundred seventy-nine".