1242212431 has 2 divisors, whose sum is σ = 1242212432. Its totient is φ = 1242212430.

The previous prime is 1242212429. The next prime is 1242212437. The reversal of 1242212431 is 1342122421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242212431 - 2¹ = 1242212429 is a prime.

It is a super-2 number, since 2×1242212431² = 3086183447461859522, which contains 22 as substring.

Together with 1242212429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242212437) 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, 621106215 + 621106216.

It is an arithmetic number, because the mean of its divisors is an integer number (621106216).

Almost surely, 2^1242212431 is an apocalyptic number.

1242212431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242212431 is an equidigital number, since it uses as much as digits as its factorization.

1242212431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 22.

The square root of 1242212431 is about 35245.0341324845. The cubic root of 1242212431 is about 1074.9756420657.

Adding to 1242212431 its reverse (1342122421), we get a palindrome (2584334852).

The spelling of 1242212431 in words is "one billion, two hundred forty-two million, two hundred twelve thousand, four hundred thirty-one".