1242041243431 has 2 divisors, whose sum is σ = 1242041243432. Its totient is φ = 1242041243430.

The previous prime is 1242041243413. The next prime is 1242041243449. The reversal of 1242041243431 is 1343421402421.

It is a happy number.

Together with previous prime (1242041243413) 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 (1242041243413) and next prime (1242041243449).

It is a cyclic number.

It is not a de Polignac number, because 1242041243431 - 2²³ = 1242032854823 is a prime.

It is a super-2 number, since 2×1242041243431² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242041243393 and 1242041243402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242041243411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621020621715 + 621020621716.

It is an arithmetic number, because the mean of its divisors is an integer number (621020621716).

Almost surely, 2^{1242041243431} is an apocalyptic number.

1242041243431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242041243431 is an equidigital number, since it uses as much as digits as its factorization.

1242041243431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 1242041243431 its reverse (1343421402421), we get a palindrome (2585462645852).

The spelling of 1242041243431 in words is "one trillion, two hundred forty-two billion, forty-one million, two hundred forty-three thousand, four hundred thirty-one".