23311112821 has 2 divisors, whose sum is σ = 23311112822. Its totient is φ = 23311112820.

The previous prime is 23311112791. The next prime is 23311112837. The reversal of 23311112821 is 12821111332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19754302500 + 3556810321 = 140550^2 + 59639^2 .

It is a cyclic number.

It is not a de Polignac number, because 23311112821 - 2¹⁹ = 23310588533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23311112221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11655556410 + 11655556411.

It is an arithmetic number, because the mean of its divisors is an integer number (11655556411).

Almost surely, 2^23311112821 is an apocalyptic number.

It is an amenable number.

23311112821 is a deficient number, since it is larger than the sum of its proper divisors (1).

23311112821 is an equidigital number, since it uses as much as digits as its factorization.

23311112821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 25.

The spelling of 23311112821 in words is "twenty-three billion, three hundred eleven million, one hundred twelve thousand, eight hundred twenty-one".