200442031021 has 4 divisors (see below), whose sum is σ = 202979272000. Its totient is φ = 197904790044.

The previous prime is 200442030941. The next prime is 200442031033. The reversal of 200442031021 is 120130244002.

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 200442031021 - 2²³ = 200433642413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200442031021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200442031081) 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, 1268620371 + ... + 1268620528.

It is an arithmetic number, because the mean of its divisors is an integer number (50744818000).

Almost surely, 2^200442031021 is an apocalyptic number.

It is an amenable number.

200442031021 is a deficient number, since it is larger than the sum of its proper divisors (2537240979).

200442031021 is an equidigital number, since it uses as much as digits as its factorization.

200442031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537240978.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 200442031021 its reverse (120130244002), we get a palindrome (320572275023).

The spelling of 200442031021 in words is "two hundred billion, four hundred forty-two million, thirty-one thousand, twenty-one".