221201232013 has 4 divisors (see below), whose sum is σ = 222889791168. Its totient is φ = 219512672860.

The previous prime is 221201232011. The next prime is 221201232019. The reversal of 221201232013 is 310232102122.

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 221201232013 - 2¹ = 221201232011 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 (221201232011) 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, 844279381 + ... + 844279642.

It is an arithmetic number, because the mean of its divisors is an integer number (55722447792).

Almost surely, 2^221201232013 is an apocalyptic number.

It is an amenable number.

221201232013 is a deficient number, since it is larger than the sum of its proper divisors (1688559155).

221201232013 is a wasteful number, since it uses less digits than its factorization.

221201232013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688559154.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221201232013 its reverse (310232102122), we get a palindrome (531433334135).

The spelling of 221201232013 in words is "two hundred twenty-one billion, two hundred one million, two hundred thirty-two thousand, thirteen".