23221231013 has 4 divisors (see below), whose sum is σ = 23264154348. Its totient is φ = 23178307680.

The previous prime is 23221231009. The next prime is 23221231031. The reversal of 23221231013 is 31013212232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4230461764 + 18990769249 = 65042^2 + 137807^2 .

It is a cyclic number.

It is not a de Polignac number, because 23221231013 - 2² = 23221231009 is a prime.

It is a super-2 number, since 2×23221231013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221231613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21460856 + ... + 21461937.

It is an arithmetic number, because the mean of its divisors is an integer number (5816038587).

Almost surely, 2^23221231013 is an apocalyptic number.

It is an amenable number.

23221231013 is a deficient number, since it is larger than the sum of its proper divisors (42923335).

23221231013 is an equidigital number, since it uses as much as digits as its factorization.

23221231013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42923334.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23221231013 its reverse (31013212232), we get a palindrome (54234443245).

The spelling of 23221231013 in words is "twenty-three billion, two hundred twenty-one million, two hundred thirty-one thousand, thirteen".