1221434422 has 16 divisors (see below), whose sum is σ = 1987287120. Its totient is φ = 559681632.

The previous prime is 1221434413. The next prime is 1221434429. The reversal of 1221434422 is 2244341221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221434429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165373 + ... + 172600.

It is an arithmetic number, because the mean of its divisors is an integer number (124205445).

Almost surely, 2^1221434422 is an apocalyptic number.

1221434422 is a deficient number, since it is larger than the sum of its proper divisors (765852698).

1221434422 is a wasteful number, since it uses less digits than its factorization.

1221434422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338127.

The product of its digits is 3072, while the sum is 25.

The square root of 1221434422 is about 34949.0260522379. The cubic root of 1221434422 is about 1068.9483427834.

Adding to 1221434422 its reverse (2244341221), we get a palindrome (3465775643).

The spelling of 1221434422 in words is "one billion, two hundred twenty-one million, four hundred thirty-four thousand, four hundred twenty-two".