2003213312221 has 4 divisors (see below), whose sum is σ = 2185323613344. Its totient is φ = 1821103011100.

The previous prime is 2003213312197. The next prime is 2003213312237. The reversal of 2003213312221 is 1222133123002.

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 2003213312221 - 2¹⁷ = 2003213181149 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003213312192 and 2003213312201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003213315221) 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, 91055150545 + ... + 91055150566.

It is an arithmetic number, because the mean of its divisors is an integer number (546330903336).

Almost surely, 2^{2003213312221} is an apocalyptic number.

It is an amenable number.

2003213312221 is a deficient number, since it is larger than the sum of its proper divisors (182110301123).

2003213312221 is a wasteful number, since it uses less digits than its factorization.

2003213312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182110301122.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 2003213312221 its reverse (1222133123002), we get a palindrome (3225346435223).

The spelling of 2003213312221 in words is "two trillion, three billion, two hundred thirteen million, three hundred twelve thousand, two hundred twenty-one".