1222112421 has 16 divisors (see below), whose sum is σ = 1836040320. Its totient is φ = 803265120.

The previous prime is 1222112413. The next prime is 1222112431. The reversal of 1222112421 is 1242112221.

1222112421 is a `hidden beast` number, since 12 + 221 + 12 + 421 = 666.

It is not a de Polignac number, because 1222112421 - 2³ = 1222112413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222112394 and 1222112403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222112431) 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, 316840 + ... + 320673.

It is an arithmetic number, because the mean of its divisors is an integer number (114752520).

Almost surely, 2^1222112421 is an apocalyptic number.

It is an amenable number.

1222112421 is a deficient number, since it is larger than the sum of its proper divisors (613927899).

1222112421 is an equidigital number, since it uses as much as digits as its factorization.

1222112421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637593 (or 637587 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 1222112421 is about 34958.7245333693. The cubic root of 1222112421 is about 1069.1460916589.

Adding to 1222112421 its reverse (1242112221), we get a palindrome (2464224642).

It can be divided in two parts, 12221 and 12421, that added together give a palindrome (24642).

The spelling of 1222112421 in words is "one billion, two hundred twenty-two million, one hundred twelve thousand, four hundred twenty-one".