200031102031021 has 4 divisors (see below), whose sum is σ = 200031389470044. Its totient is φ = 200030814592000.

The previous prime is 200031102030989. The next prime is 200031102031087. The reversal of 200031102031021 is 120130201130002.

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 70078831116100 + 129952270914921 = 8371310^2 + 11399661^2 .

It is a cyclic number.

It is not a de Polignac number, because 200031102031021 - 2⁵ = 200031102030989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200031102030986 and 200031102031004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200031102031921) 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, 142673110 + ... + 144068311.

It is an arithmetic number, because the mean of its divisors is an integer number (50007847367511).

Almost surely, 2^{200031102031021} is an apocalyptic number.

It is an amenable number.

200031102031021 is a deficient number, since it is larger than the sum of its proper divisors (287439023).

200031102031021 is an equidigital number, since it uses as much as digits as its factorization.

200031102031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287439022.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 200031102031021 its reverse (120130201130002), we get a palindrome (320161303161023).

The spelling of 200031102031021 in words is "two hundred trillion, thirty-one billion, one hundred two million, thirty-one thousand, twenty-one".