231111221203 has 2 divisors, whose sum is σ = 231111221204. Its totient is φ = 231111221202.

The previous prime is 231111221161. The next prime is 231111221221. The reversal of 231111221203 is 302122111132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231111221203 is a prime.

It is not a weakly prime, because it can be changed into another prime (231111224203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115555610601 + 115555610602.

It is an arithmetic number, because the mean of its divisors is an integer number (115555610602).

Almost surely, 2^231111221203 is an apocalyptic number.

231111221203 is a deficient number, since it is larger than the sum of its proper divisors (1).

231111221203 is an equidigital number, since it uses as much as digits as its factorization.

231111221203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 231111221203 its reverse (302122111132), we get a palindrome (533233332335).

The spelling of 231111221203 in words is "two hundred thirty-one billion, one hundred eleven million, two hundred twenty-one thousand, two hundred three".