1243222031 has 2 divisors, whose sum is σ = 1243222032. Its totient is φ = 1243222030.

The previous prime is 1243222021. The next prime is 1243222033. The reversal of 1243222031 is 1302223421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243222031 is a prime.

It is a super-2 number, since 2×1243222031² = 3091202036727529922, which contains 22 as substring.

Together with 1243222033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243221994 and 1243222012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243222033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621611015 + 621611016.

It is an arithmetic number, because the mean of its divisors is an integer number (621611016).

Almost surely, 2^1243222031 is an apocalyptic number.

1243222031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243222031 is an equidigital number, since it uses as much as digits as its factorization.

1243222031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1243222031 is about 35259.3538085995. The cubic root of 1243222031 is about 1075.2667896697.

Adding to 1243222031 its reverse (1302223421), we get a palindrome (2545445452).

The spelling of 1243222031 in words is "one billion, two hundred forty-three million, two hundred twenty-two thousand, thirty-one".