200390121 has 6 divisors (see below), whose sum is σ = 289452410. Its totient is φ = 133593408.

The previous prime is 200390089. The next prime is 200390123. The reversal of 200390121 is 121093002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 101606400 + 98783721 = 10080^2 + 9939^2 .

It is not a de Polignac number, because 200390121 - 2⁵ = 200390089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200390094 and 200390103.

It is not an unprimeable number, because it can be changed into a prime (200390123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11132776 + ... + 11132793.

Almost surely, 2^200390121 is an apocalyptic number.

It is an amenable number.

200390121 is a deficient number, since it is larger than the sum of its proper divisors (89062289).

200390121 is a wasteful number, since it uses less digits than its factorization.

200390121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22265575 (or 22265572 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 200390121 is about 14155.9217644066. The cubic root of 200390121 is about 585.1835409187.

The spelling of 200390121 in words is "two hundred million, three hundred ninety thousand, one hundred twenty-one".