117772213345921 has 16 divisors (see below), whose sum is σ = 121008565456128. Its totient is φ = 114538678214400.

The previous prime is 117772213345901. The next prime is 117772213345981. The reversal of 117772213345921 is 129543312277711.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117772213345921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117772213345901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849406761 + ... + 849545401.

It is an arithmetic number, because the mean of its divisors is an integer number (7563035341008).

Almost surely, 2^{117772213345921} is an apocalyptic number.

It is an amenable number.

117772213345921 is a deficient number, since it is larger than the sum of its proper divisors (3236352110207).

117772213345921 is a wasteful number, since it uses less digits than its factorization.

117772213345921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148632.

The product of its digits is 4445280, while the sum is 55.

The spelling of 117772213345921 in words is "one hundred seventeen trillion, seven hundred seventy-two billion, two hundred thirteen million, three hundred forty-five thousand, nine hundred twenty-one".