117112721 has 4 divisors (see below), whose sum is σ = 127759344. Its totient is φ = 106466100.

The previous prime is 117112703. The next prime is 117112739. The reversal of 117112721 is 127211711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 127211711 = 11 ⋅11564701.

It is an interprime number because it is at equal distance from previous prime (117112703) and next prime (117112739).

It is a cyclic number.

It is not a de Polignac number, because 117112721 - 2⁶ = 117112657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (117112771) 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 3 ways as a sum of consecutive naturals, for example, 5323295 + ... + 5323316.

It is an arithmetic number, because the mean of its divisors is an integer number (31939836).

Almost surely, 2^117112721 is an apocalyptic number.

117112721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

117112721 is a deficient number, since it is larger than the sum of its proper divisors (10646623).

117112721 is a wasteful number, since it uses less digits than its factorization.

117112721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10646622.

The product of its digits is 196, while the sum is 23.

The square root of 117112721 is about 10821.8631020726. The cubic root of 117112721 is about 489.2543441492.

The spelling of 117112721 in words is "one hundred seventeen million, one hundred twelve thousand, seven hundred twenty-one".