2002203100021 has 4 divisors (see below), whose sum is σ = 2002211719200. Its totient is φ = 2002194480844.

The previous prime is 2002203099983. The next prime is 2002203100033. The reversal of 2002203100021 is 1200013022002.

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 a de Polignac number, because none of the positive numbers 2^k-2002203100021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002203099974 and 2002203100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002203101021) 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, 3951211 + ... + 4429048.

It is an arithmetic number, because the mean of its divisors is an integer number (500552929800).

Almost surely, 2^{2002203100021} is an apocalyptic number.

It is an amenable number.

2002203100021 is a deficient number, since it is larger than the sum of its proper divisors (8619179).

2002203100021 is an equidigital number, since it uses as much as digits as its factorization.

2002203100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8619178.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 2002203100021 its reverse (1200013022002), we get a palindrome (3202216122023).

The spelling of 2002203100021 in words is "two trillion, two billion, two hundred three million, one hundred thousand, twenty-one".