1232213131 has 2 divisors, whose sum is σ = 1232213132. Its totient is φ = 1232213130.

The previous prime is 1232213113. The next prime is 1232213149. The reversal of 1232213131 is 1313122321.

Together with previous prime (1232213113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (1232213113) and next prime (1232213149).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232213131 is a prime.

It is a super-2 number, since 2×1232213131² = 3036698400417646322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1232213099 and 1232213108.

It is not a weakly prime, because it can be changed into another prime (1232213111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616106565 + 616106566.

It is an arithmetic number, because the mean of its divisors is an integer number (616106566).

Almost surely, 2^1232213131 is an apocalyptic number.

1232213131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232213131 is an equidigital number, since it uses as much as digits as its factorization.

1232213131 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1232213131 is about 35102.8934847257. The cubic root of 1232213131 is about 1072.0834970954.

Adding to 1232213131 its reverse (1313122321), we get a palindrome (2545335452).

The spelling of 1232213131 in words is "one billion, two hundred thirty-two million, two hundred thirteen thousand, one hundred thirty-one".