119916721 has 4 divisors (see below), whose sum is σ = 119995200. Its totient is φ = 119838244.

The previous prime is 119916697. The next prime is 119916743. The reversal of 119916721 is 127619911.

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.

It is a cyclic number.

It is not a de Polignac number, because 119916721 - 2¹⁷ = 119785649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (119916751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36901 + ... + 40018.

It is an arithmetic number, because the mean of its divisors is an integer number (29998800).

Almost surely, 2^119916721 is an apocalyptic number.

It is an amenable number.

119916721 is a deficient number, since it is larger than the sum of its proper divisors (78479).

119916721 is an equidigital number, since it uses as much as digits as its factorization.

119916721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78478.

The product of its digits is 6804, while the sum is 37.

The square root of 119916721 is about 10950.6493414774. The cubic root of 119916721 is about 493.1282864188.

The spelling of 119916721 in words is "one hundred nineteen million, nine hundred sixteen thousand, seven hundred twenty-one".