2000031231221 has 4 divisors (see below), whose sum is σ = 2064548367744. Its totient is φ = 1935514094700.

The previous prime is 2000031231199. The next prime is 2000031231229. The reversal of 2000031231221 is 1221321300002.

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 2000031231221 - 2⁶ = 2000031231157 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 2000031231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000031231229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32258568215 + ... + 32258568276.

It is an arithmetic number, because the mean of its divisors is an integer number (516137091936).

Almost surely, 2^{2000031231221} is an apocalyptic number.

It is an amenable number.

2000031231221 is a deficient number, since it is larger than the sum of its proper divisors (64517136523).

2000031231221 is an equidigital number, since it uses as much as digits as its factorization.

2000031231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64517136522.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2000031231221 its reverse (1221321300002), we get a palindrome (3221352531223).

The spelling of 2000031231221 in words is "two trillion, thirty-one million, two hundred thirty-one thousand, two hundred twenty-one".