200021001231 has 4 divisors (see below), whose sum is σ = 266694668312. Its totient is φ = 133347334152.

The previous prime is 200021001217. The next prime is 200021001281. The reversal of 200021001231 is 132100120002.

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

It is not a de Polignac number, because 200021001231 - 2²³ = 200012612623 is a prime.

It is a super-2 number, since 2×200021001231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021001281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33336833536 + ... + 33336833541.

It is an arithmetic number, because the mean of its divisors is an integer number (66673667078).

Almost surely, 2^200021001231 is an apocalyptic number.

200021001231 is a deficient number, since it is larger than the sum of its proper divisors (66673667081).

200021001231 is an equidigital number, since it uses as much as digits as its factorization.

200021001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66673667080.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 200021001231 its reverse (132100120002), we get a palindrome (332121121233).

The spelling of 200021001231 in words is "two hundred billion, twenty-one million, one thousand, two hundred thirty-one".