200042021 has 8 divisors (see below), whose sum is σ = 201696480. Its totient is φ = 198392688.

The previous prime is 200041999. The next prime is 200042053. The reversal of 200042021 is 120240002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200042021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200041993 and 200042011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200042081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122750 + ... + 124368.

It is an arithmetic number, because the mean of its divisors is an integer number (25212060).

Almost surely, 2^200042021 is an apocalyptic number.

It is an amenable number.

200042021 is a deficient number, since it is larger than the sum of its proper divisors (1654459).

200042021 is a wasteful number, since it uses less digits than its factorization.

200042021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 200042021 is about 14143.6212124053. The cubic root of 200042021 is about 584.8445014910.

Adding to 200042021 its reverse (120240002), we get a palindrome (320282023).

The spelling of 200042021 in words is "two hundred million, forty-two thousand, twenty-one".