121282779 has 4 divisors (see below), whose sum is σ = 161710376. Its totient is φ = 80855184.

The previous prime is 121282769. The next prime is 121282783. The reversal of 121282779 is 977282121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121282779 - 2⁸ = 121282523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121282729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20213794 + ... + 20213799.

It is an arithmetic number, because the mean of its divisors is an integer number (40427594).

Almost surely, 2^121282779 is an apocalyptic number.

121282779 is a deficient number, since it is larger than the sum of its proper divisors (40427597).

121282779 is an equidigital number, since it uses as much as digits as its factorization.

121282779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40427596.

The product of its digits is 28224, while the sum is 39.

The square root of 121282779 is about 11012.8460899079. The cubic root of 121282779 is about 494.9937474978.

The spelling of 121282779 in words is "one hundred twenty-one million, two hundred eighty-two thousand, seven hundred seventy-nine".