1212220426 has 8 divisors (see below), whose sum is σ = 1848139524. Its totient is φ = 596173920.

The previous prime is 1212220397. The next prime is 1212220453. The reversal of 1212220426 is 6240222121.

It can be written as a sum of positive squares in 2 ways, for example, as 1198890625 + 13329801 = 34625^2 + 3651^2 .

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

It is a super-2 number, since 2×1212220426² = 2938956722423242952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212220397 and 1212220406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4967995 + ... + 4968238.

Almost surely, 2^1212220426 is an apocalyptic number.

1212220426 is a deficient number, since it is larger than the sum of its proper divisors (635919098).

1212220426 is an equidigital number, since it uses as much as digits as its factorization.

1212220426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9936296.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1212220426 is about 34816.9560128395. The cubic root of 1212220426 is about 1066.2536541433.

Adding to 1212220426 its reverse (6240222121), we get a palindrome (7452442547).

The spelling of 1212220426 in words is "one billion, two hundred twelve million, two hundred twenty thousand, four hundred twenty-six".