13111221023 has 2 divisors, whose sum is σ = 13111221024. Its totient is φ = 13111221022.

The previous prime is 13111220987. The next prime is 13111221029. The reversal of 13111221023 is 32012211131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13111221023 - 2¹⁶ = 13111155487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13111220992 and 13111221010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13111221029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6555610511 + 6555610512.

It is an arithmetic number, because the mean of its divisors is an integer number (6555610512).

Almost surely, 2^13111221023 is an apocalyptic number.

13111221023 is a deficient number, since it is larger than the sum of its proper divisors (1).

13111221023 is an equidigital number, since it uses as much as digits as its factorization.

13111221023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13111221023 its reverse (32012211131), we get a palindrome (45123432154).

The spelling of 13111221023 in words is "thirteen billion, one hundred eleven million, two hundred twenty-one thousand, twenty-three".