121977433859 has 4 divisors (see below), whose sum is σ = 121983497616. Its totient is φ = 121971370104.

The previous prime is 121977433849. The next prime is 121977433867. The reversal of 121977433859 is 958334779121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121977433859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121977433798 and 121977433807.

It is not an unprimeable number, because it can be changed into a prime (121977433829) 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, 3001604 + ... + 3041969.

It is an arithmetic number, because the mean of its divisors is an integer number (30495874404).

Almost surely, 2^121977433859 is an apocalyptic number.

121977433859 is a deficient number, since it is larger than the sum of its proper divisors (6063757).

121977433859 is an equidigital number, since it uses as much as digits as its factorization.

121977433859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6063756.

The product of its digits is 11430720, while the sum is 59.

The spelling of 121977433859 in words is "one hundred twenty-one billion, nine hundred seventy-seven million, four hundred thirty-three thousand, eight hundred fifty-nine".