777157120121 has 8 divisors (see below), whose sum is σ = 823496129280. Its totient is φ = 730887431488.

The previous prime is 777157120109. The next prime is 777157120123. The reversal of 777157120121 is 121021751777.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-777157120121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (777157120123) 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 7 ways as a sum of consecutive naturals, for example, 17307041 + ... + 17351886.

It is an arithmetic number, because the mean of its divisors is an integer number (102937016160).

Almost surely, 2^777157120121 is an apocalyptic number.

It is an amenable number.

777157120121 is a deficient number, since it is larger than the sum of its proper divisors (46339009159).

777157120121 is a wasteful number, since it uses less digits than its factorization.

777157120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34660263.

The product of its (nonzero) digits is 48020, while the sum is 41.

Adding to 777157120121 its reverse (121021751777), we get a palindrome (898178871898).

The spelling of 777157120121 in words is "seven hundred seventy-seven billion, one hundred fifty-seven million, one hundred twenty thousand, one hundred twenty-one".