1243421421422 has 8 divisors (see below), whose sum is σ = 1910623159872. Its totient is φ = 606547034800.

The previous prime is 1243421421419. The next prime is 1243421421427. The reversal of 1243421421422 is 2241241243421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1243421421422² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243421421427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7581837854 + ... + 7581838017.

It is an arithmetic number, because the mean of its divisors is an integer number (238827894984).

Almost surely, 2^{1243421421422} is an apocalyptic number.

1243421421422 is a deficient number, since it is larger than the sum of its proper divisors (667201738450).

1243421421422 is a wasteful number, since it uses less digits than its factorization.

1243421421422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15163675914.

The product of its digits is 24576, while the sum is 32.

Adding to 1243421421422 its reverse (2241241243421), we get a palindrome (3484662664843).

The spelling of 1243421421422 in words is "one trillion, two hundred forty-three billion, four hundred twenty-one million, four hundred twenty-one thousand, four hundred twenty-two".