200002021 has 4 divisors (see below), whose sum is σ = 201049344. Its totient is φ = 198954700.

The previous prime is 200002007. The next prime is 200002027. The reversal of 200002021 is 120200002.

It is a happy number.

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 200002021 - 2⁹ = 200001509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200001995 and 200002013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200002027) 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, 523375 + ... + 523756.

It is an arithmetic number, because the mean of its divisors is an integer number (50262336).

Almost surely, 2^200002021 is an apocalyptic number.

It is an amenable number.

200002021 is a deficient number, since it is larger than the sum of its proper divisors (1047323).

200002021 is a wasteful number, since it uses less digits than its factorization.

200002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047322.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 200002021 is about 14142.2070766907. The cubic root of 200002021 is about 584.8055174492.

Adding to 200002021 its reverse (120200002), we get a palindrome (320202023).

The spelling of 200002021 in words is "two hundred million, two thousand, twenty-one".