1243420424331 has 16 divisors (see below), whose sum is σ = 1669163892000. Its totient is φ = 823312908288.

The previous prime is 1243420424329. The next prime is 1243420424371. The reversal of 1243420424331 is 1334240243421.

It is not a de Polignac number, because 1243420424331 - 2¹ = 1243420424329 is a prime.

It is a super-2 number, since 2×1243420424331² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1243420424292 and 1243420424301.

It is not an unprimeable number, because it can be changed into a prime (1243420424321) 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 in 15 ways as a sum of consecutive naturals, for example, 5380005 + ... + 5606361.

It is an arithmetic number, because the mean of its divisors is an integer number (104322743250).

Almost surely, 2^{1243420424331} is an apocalyptic number.

1243420424331 is a deficient number, since it is larger than the sum of its proper divisors (425743467669).

1243420424331 is a wasteful number, since it uses less digits than its factorization.

1243420424331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238798.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 1243420424331 its reverse (1334240243421), we get a palindrome (2577660667752).

The spelling of 1243420424331 in words is "one trillion, two hundred forty-three billion, four hundred twenty million, four hundred twenty-four thousand, three hundred thirty-one".