117877771221 has 16 divisors (see below), whose sum is σ = 181212860544. Its totient is φ = 66762630144.

The previous prime is 117877771217. The next prime is 117877771261. The reversal of 117877771221 is 122177778711.

It is not a de Polignac number, because 117877771221 - 2² = 117877771217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117877771261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24834916 + ... + 24839661.

It is an arithmetic number, because the mean of its divisors is an integer number (11325803784).

Almost surely, 2^117877771221 is an apocalyptic number.

It is an amenable number.

117877771221 is a deficient number, since it is larger than the sum of its proper divisors (63335089323).

117877771221 is a wasteful number, since it uses less digits than its factorization.

117877771221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49674700.

The product of its digits is 537824, while the sum is 51.

The spelling of 117877771221 in words is "one hundred seventeen billion, eight hundred seventy-seven million, seven hundred seventy-one thousand, two hundred twenty-one".