119990021 has 4 divisors (see below), whose sum is σ = 120070944. Its totient is φ = 119909100.

The previous prime is 119989993. The next prime is 119990033. The reversal of 119990021 is 120099911.

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 119990021 - 2⁶ = 119989957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 119990021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (119990051) 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, 38195 + ... + 41216.

It is an arithmetic number, because the mean of its divisors is an integer number (30017736).

Almost surely, 2^119990021 is an apocalyptic number.

It is an amenable number.

119990021 is a deficient number, since it is larger than the sum of its proper divisors (80923).

119990021 is an equidigital number, since it uses as much as digits as its factorization.

119990021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80922.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 119990021 is about 10953.9956636836. The cubic root of 119990021 is about 493.2287420814.

The spelling of 119990021 in words is "one hundred nineteen million, nine hundred ninety thousand, twenty-one".