117372221 has 4 divisors (see below), whose sum is σ = 118691100. Its totient is φ = 116053344.

The previous prime is 117372191. The next prime is 117372223. The reversal of 117372221 is 122273711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122273711 = 7 ⋅17467673.

It can be written as a sum of positive squares in 2 ways, for example, as 41925625 + 75446596 = 6475^2 + 8686^2 .

It is a cyclic number.

It is not a de Polignac number, because 117372221 - 2¹⁰ = 117371197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117372223) 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, 659306 + ... + 659483.

It is an arithmetic number, because the mean of its divisors is an integer number (29672775).

Almost surely, 2^117372221 is an apocalyptic number.

It is an amenable number.

117372221 is a deficient number, since it is larger than the sum of its proper divisors (1318879).

117372221 is an equidigital number, since it uses as much as digits as its factorization.

117372221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318878.

The product of its digits is 1176, while the sum is 26.

The square root of 117372221 is about 10833.8460853014. The cubic root of 117372221 is about 489.6154431034.

The spelling of 117372221 in words is "one hundred seventeen million, three hundred seventy-two thousand, two hundred twenty-one".