23031221113 has 2 divisors, whose sum is σ = 23031221114. Its totient is φ = 23031221112.

The previous prime is 23031221077. The next prime is 23031221117. The reversal of 23031221113 is 31112213032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22070964969 + 960256144 = 148563^2 + 30988^2 .

It is a cyclic number.

It is not a de Polignac number, because 23031221113 - 2²¹ = 23029123961 is a prime.

It is not a weakly prime, because it can be changed into another prime (23031221117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11515610556 + 11515610557.

It is an arithmetic number, because the mean of its divisors is an integer number (11515610557).

Almost surely, 2^23031221113 is an apocalyptic number.

It is an amenable number.

23031221113 is a deficient number, since it is larger than the sum of its proper divisors (1).

23031221113 is an equidigital number, since it uses as much as digits as its factorization.

23031221113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 23031221113 its reverse (31112213032), we get a palindrome (54143434145).

The spelling of 23031221113 in words is "twenty-three billion, thirty-one million, two hundred twenty-one thousand, one hundred thirteen".