200423121 has 4 divisors (see below), whose sum is σ = 267230832. Its totient is φ = 133615412.

The previous prime is 200423101. The next prime is 200423123. The reversal of 200423121 is 121324002.

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 200423121 - 2⁹ = 200422609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200423121.

It is not an unprimeable number, because it can be changed into a prime (200423123) 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, 33403851 + ... + 33403856.

It is an arithmetic number, because the mean of its divisors is an integer number (66807708).

Almost surely, 2^200423121 is an apocalyptic number.

It is an amenable number.

200423121 is a deficient number, since it is larger than the sum of its proper divisors (66807711).

200423121 is an equidigital number, since it uses as much as digits as its factorization.

200423121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66807710.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 200423121 is about 14157.0873063636. The cubic root of 200423121 is about 585.2156615921.

Adding to 200423121 its reverse (121324002), we get a palindrome (321747123).

The spelling of 200423121 in words is "two hundred million, four hundred twenty-three thousand, one hundred twenty-one".