200023231021021 has 4 divisors (see below), whose sum is σ = 200023265980444. Its totient is φ = 200023196061600.

The previous prime is 200023231020989. The next prime is 200023231021039. The reversal of 200023231021021 is 120120132320002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82387753632900 + 117635477388121 = 9076770^2 + 10845989^2 .

It is a cyclic number.

It is not a de Polignac number, because 200023231021021 - 2⁵ = 200023231020989 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 200023231021021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200023231021421) 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, 6668370 + ... + 21083491.

It is an arithmetic number, because the mean of its divisors is an integer number (50005816495111).

Almost surely, 2^{200023231021021} is an apocalyptic number.

It is an amenable number.

200023231021021 is a deficient number, since it is larger than the sum of its proper divisors (34959423).

200023231021021 is an equidigital number, since it uses as much as digits as its factorization.

200023231021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34959422.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 200023231021021 its reverse (120120132320002), we get a palindrome (320143363341023).

The spelling of 200023231021021 in words is "two hundred trillion, twenty-three billion, two hundred thirty-one million, twenty-one thousand, twenty-one".