221131321339 has 4 divisors (see below), whose sum is σ = 221165511040. Its totient is φ = 221097131640.

The previous prime is 221131321297. The next prime is 221131321373. The reversal of 221131321339 is 933123131122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221131321339 - 2¹⁵ = 221131288571 is a prime.

It is a super-2 number, since 2×221131321339² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221131321339.

It is not an unprimeable number, because it can be changed into a prime (221131321139) 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, 17085147 + ... + 17098084.

It is an arithmetic number, because the mean of its divisors is an integer number (55291377760).

Almost surely, 2^221131321339 is an apocalyptic number.

221131321339 is a deficient number, since it is larger than the sum of its proper divisors (34189701).

221131321339 is an equidigital number, since it uses as much as digits as its factorization.

221131321339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34189700.

The product of its digits is 5832, while the sum is 31.

The spelling of 221131321339 in words is "two hundred twenty-one billion, one hundred thirty-one million, three hundred twenty-one thousand, three hundred thirty-nine".