20002013221 has 16 divisors (see below), whose sum is σ = 21897993600. Its totient is φ = 18194552320.

The previous prime is 20002013219. The next prime is 20002013263. The reversal of 20002013221 is 12231020002.

It is a cyclic number.

It is not a de Polignac number, because 20002013221 - 2¹ = 20002013219 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 (20002013201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59521 + ... + 208678.

It is an arithmetic number, because the mean of its divisors is an integer number (1368624600).

Almost surely, 2^20002013221 is an apocalyptic number.

It is an amenable number.

20002013221 is a deficient number, since it is larger than the sum of its proper divisors (1895980379).

20002013221 is a wasteful number, since it uses less digits than its factorization.

20002013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268364.

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

Adding to 20002013221 its reverse (12231020002), we get a palindrome (32233033223).

The spelling of 20002013221 in words is "twenty billion, two million, thirteen thousand, two hundred twenty-one".