2003202221021 has 4 divisors (see below), whose sum is σ = 2013370760412. Its totient is φ = 1993033681632.

The previous prime is 2003202220963. The next prime is 2003202221081. The reversal of 2003202221021 is 1201222023002.

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 1918571265625 + 84630955396 = 1385125^2 + 290914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2003202221021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003202221081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5084269400 + ... + 5084269793.

It is an arithmetic number, because the mean of its divisors is an integer number (503342690103).

Almost surely, 2^{2003202221021} is an apocalyptic number.

It is an amenable number.

2003202221021 is a deficient number, since it is larger than the sum of its proper divisors (10168539391).

2003202221021 is a wasteful number, since it uses less digits than its factorization.

2003202221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10168539390.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 2003202221021 its reverse (1201222023002), we get a palindrome (3204424244023).

The spelling of 2003202221021 in words is "two trillion, three billion, two hundred two million, two hundred twenty-one thousand, twenty-one".