121042779 has 32 divisors (see below), whose sum is σ = 190466304. Its totient is φ = 67409280.

The previous prime is 121042777. The next prime is 121042841. The reversal of 121042779 is 977240121.

It is not a de Polignac number, because 121042779 - 2¹ = 121042777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (121042777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120909 + ... + 121905.

It is an arithmetic number, because the mean of its divisors is an integer number (5952072).

Almost surely, 2^121042779 is an apocalyptic number.

121042779 is a deficient number, since it is larger than the sum of its proper divisors (69423525).

121042779 is a wasteful number, since it uses less digits than its factorization.

121042779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 121042779 is about 11001.9443281631. The cubic root of 121042779 is about 494.6670263481.

The spelling of 121042779 in words is "one hundred twenty-one million, forty-two thousand, seven hundred seventy-nine".