442121099 has 4 divisors (see below), whose sum is σ = 505281264. Its totient is φ = 378960936.

The previous prime is 442121083. The next prime is 442121143. The reversal of 442121099 is 990121244.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442121099 - 2⁴ = 442121083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442121059) 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, 31580072 + ... + 31580085.

It is an arithmetic number, because the mean of its divisors is an integer number (126320316).

Almost surely, 2^442121099 is an apocalyptic number.

442121099 is a deficient number, since it is larger than the sum of its proper divisors (63160165).

442121099 is an equidigital number, since it uses as much as digits as its factorization.

442121099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63160164.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 442121099 is about 21026.6758904017. The cubic root of 442121099 is about 761.8107211461.

The spelling of 442121099 in words is "four hundred forty-two million, one hundred twenty-one thousand, ninety-nine".