121877464807 has 18 divisors (see below), whose sum is σ = 145633244568. Its totient is φ = 99906963552.

The previous prime is 121877464777. The next prime is 121877464817. The reversal of 121877464807 is 708464778121.

It is a de Polignac number, because none of the positive numbers 2^k-121877464807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121877464817) 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 17 ways as a sum of consecutive naturals, for example, 21241243 + ... + 21246979.

Almost surely, 2^121877464807 is an apocalyptic number.

121877464807 is a deficient number, since it is larger than the sum of its proper divisors (23755779761).

121877464807 is an frugal number, since it uses more digits than its factorization.

121877464807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11527 (or 5767 counting only the distinct ones).

The product of its (nonzero) digits is 4214784, while the sum is 55.

The spelling of 121877464807 in words is "one hundred twenty-one billion, eight hundred seventy-seven million, four hundred sixty-four thousand, eight hundred seven".