2003231120021 has 2 divisors, whose sum is σ = 2003231120022. Its totient is φ = 2003231120020.

The previous prime is 2003231119999. The next prime is 2003231120071. The reversal of 2003231120021 is 1200211323002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1688778220900 + 314452899121 = 1299530^2 + 560761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003231120021 - 2⁶ = 2003231119957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2003231120071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001615560010 + 1001615560011.

It is an arithmetic number, because the mean of its divisors is an integer number (1001615560011).

Almost surely, 2^{2003231120021} is an apocalyptic number.

It is an amenable number.

2003231120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003231120021 is an equidigital number, since it uses as much as digits as its factorization.

2003231120021 is an evil number, because the sum of its binary digits is even.

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

Adding to 2003231120021 its reverse (1200211323002), we get a palindrome (3203442443023).

The spelling of 2003231120021 in words is "two trillion, three billion, two hundred thirty-one million, one hundred twenty thousand, twenty-one".