119900021 has 2 divisors, whose sum is σ = 119900022. Its totient is φ = 119900020.

The previous prime is 119900003. The next prime is 119900041. The reversal of 119900021 is 120009911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77193796 + 42706225 = 8786^2 + 6535^2 .

It is a cyclic number.

It is not a de Polignac number, because 119900021 - 2⁶ = 119899957 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 119900021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (119900041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59950010 + 59950011.

It is an arithmetic number, because the mean of its divisors is an integer number (59950011).

Almost surely, 2^119900021 is an apocalyptic number.

It is an amenable number.

119900021 is a deficient number, since it is larger than the sum of its proper divisors (1).

119900021 is an equidigital number, since it uses as much as digits as its factorization.

119900021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 119900021 is about 10949.8868030679. The cubic root of 119900021 is about 493.1053937962.

Adding to 119900021 its reverse (120009911), we get a palindrome (239909932).

The spelling of 119900021 in words is "one hundred nineteen million, nine hundred thousand, twenty-one".