121379780829 has 16 divisors (see below), whose sum is σ = 166290365120. Its totient is φ = 78696541440.

The previous prime is 121379780791. The next prime is 121379780849. The reversal of 121379780829 is 928087973121.

It is not a de Polignac number, because 121379780829 - 2⁹ = 121379780317 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 (121379780849) 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 15 ways as a sum of consecutive naturals, for example, 9052 + ... + 492789.

It is an arithmetic number, because the mean of its divisors is an integer number (10393147820).

Almost surely, 2^121379780829 is an apocalyptic number.

It is an amenable number.

121379780829 is a deficient number, since it is larger than the sum of its proper divisors (44910584291).

121379780829 is a wasteful number, since it uses less digits than its factorization.

121379780829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504060.

The product of its (nonzero) digits is 3048192, while the sum is 57.

The spelling of 121379780829 in words is "one hundred twenty-one billion, three hundred seventy-nine million, seven hundred eighty thousand, eight hundred twenty-nine".