20003221213 has 4 divisors (see below), whose sum is σ = 20468412448. Its totient is φ = 19538029980.

The previous prime is 20003221201. The next prime is 20003221283. The reversal of 20003221213 is 31212230002.

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 20003221213 - 2²¹ = 20001124061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003221283) 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, 232595553 + ... + 232595638.

It is an arithmetic number, because the mean of its divisors is an integer number (5117103112).

Almost surely, 2^20003221213 is an apocalyptic number.

It is an amenable number.

20003221213 is a deficient number, since it is larger than the sum of its proper divisors (465191235).

20003221213 is an equidigital number, since it uses as much as digits as its factorization.

20003221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465191234.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20003221213 its reverse (31212230002), we get a palindrome (51215451215).

The spelling of 20003221213 in words is "twenty billion, three million, two hundred twenty-one thousand, two hundred thirteen".