213221204013 has 16 divisors (see below), whose sum is σ = 296700114816. Its totient is φ = 135946736640.

The previous prime is 213221203999. The next prime is 213221204033. The reversal of 213221204013 is 310402122312.

It is not a de Polignac number, because 213221204013 - 2⁴ = 213221203997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213221204033) 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, 237981 + ... + 695037.

It is an arithmetic number, because the mean of its divisors is an integer number (18543757176).

Almost surely, 2^213221204013 is an apocalyptic number.

213221204013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

213221204013 is a deficient number, since it is larger than the sum of its proper divisors (83478910803).

213221204013 is a wasteful number, since it uses less digits than its factorization.

213221204013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463844.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 213221204013 its reverse (310402122312), we get a palindrome (523623326325).

The spelling of 213221204013 in words is "two hundred thirteen billion, two hundred twenty-one million, two hundred four thousand, thirteen".