1221042443422 has 8 divisors (see below), whose sum is σ = 1856653578576. Its totient is φ = 602157917232.

The previous prime is 1221042443393. The next prime is 1221042443461. The reversal of 1221042443422 is 2243442401221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4181652058 + ... + 4181652349.

It is an arithmetic number, because the mean of its divisors is an integer number (232081697322).

Almost surely, 2^{1221042443422} is an apocalyptic number.

1221042443422 is a deficient number, since it is larger than the sum of its proper divisors (635611135154).

1221042443422 is an equidigital number, since it uses as much as digits as its factorization.

1221042443422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8363304482.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 1221042443422 its reverse (2243442401221), we get a palindrome (3464484844643).

The spelling of 1221042443422 in words is "one trillion, two hundred twenty-one billion, forty-two million, four hundred forty-three thousand, four hundred twenty-two".