117222721 has 16 divisors (see below), whose sum is σ = 147604608. Its totient is φ = 90432000.

The previous prime is 117222719. The next prime is 117222739. The reversal of 117222721 is 127222711.

It is a cyclic number.

It is not a de Polignac number, because 117222721 - 2¹ = 117222719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117222221) 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, 241 + ... + 15313.

It is an arithmetic number, because the mean of its divisors is an integer number (9225288).

Almost surely, 2^117222721 is an apocalyptic number.

117222721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

117222721 is a deficient number, since it is larger than the sum of its proper divisors (30381887).

117222721 is a wasteful number, since it uses less digits than its factorization.

117222721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15192.

The product of its digits is 784, while the sum is 25.

The square root of 117222721 is about 10826.9442133965. The cubic root of 117222721 is about 489.4074762098.

The spelling of 117222721 in words is "one hundred seventeen million, two hundred twenty-two thousand, seven hundred twenty-one".