221331203013 has 4 divisors (see below), whose sum is σ = 295108270688. Its totient is φ = 147554135340.

The previous prime is 221331202979. The next prime is 221331203017. The reversal of 221331203013 is 310302133122.

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 not a de Polignac number, because 221331203013 - 2¹² = 221331198917 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 (221331203017) 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, 36888533833 + ... + 36888533838.

It is an arithmetic number, because the mean of its divisors is an integer number (73777067672).

Almost surely, 2^221331203013 is an apocalyptic number.

It is an amenable number.

221331203013 is a deficient number, since it is larger than the sum of its proper divisors (73777067675).

221331203013 is an equidigital number, since it uses as much as digits as its factorization.

221331203013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73777067674.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 221331203013 its reverse (310302133122), we get a palindrome (531633336135).

The spelling of 221331203013 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred three thousand, thirteen".