1212222403 has 8 divisors (see below), whose sum is σ = 1385711360. Its totient is φ = 1038812040.

The previous prime is 1212222377. The next prime is 1212222499. The reversal of 1212222403 is 3042222121.

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

It is not a de Polignac number, because 1212222403 - 2⁹ = 1212221891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212222203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18298 + ... + 52528.

It is an arithmetic number, because the mean of its divisors is an integer number (173213920).

Almost surely, 2^1212222403 is an apocalyptic number.

1212222403 is a deficient number, since it is larger than the sum of its proper divisors (173488957).

1212222403 is an equidigital number, since it uses as much as digits as its factorization.

1212222403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39297.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1212222403 is about 34816.9844041669. The cubic root of 1212222403 is about 1066.2542337910.

Adding to 1212222403 its reverse (3042222121), we get a palindrome (4254444524).

The spelling of 1212222403 in words is "one billion, two hundred twelve million, two hundred twenty-two thousand, four hundred three".