2131122223 has 2 divisors, whose sum is σ = 2131122224. Its totient is φ = 2131122222.

The previous prime is 2131122199. The next prime is 2131122229. The reversal of 2131122223 is 3222211312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131122223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2131122223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131122229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065561111 + 1065561112.

It is an arithmetic number, because the mean of its divisors is an integer number (1065561112).

Almost surely, 2^2131122223 is an apocalyptic number.

2131122223 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131122223 is an equidigital number, since it uses as much as digits as its factorization.

2131122223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 2131122223 is about 46164.0793583063. The cubic root of 2131122223 is about 1286.8742749899.

Adding to 2131122223 its reverse (3222211312), we get a palindrome (5353333535).

It can be divided in two parts, 21311 and 22223, that added together give a palindrome (43534).

The spelling of 2131122223 in words is "two billion, one hundred thirty-one million, one hundred twenty-two thousand, two hundred twenty-three".