12212403 has 16 divisors (see below), whose sum is σ = 18658560. Its totient is φ = 6960096.

The previous prime is 12212399. The next prime is 12212407. The reversal of 12212403 is 30421221.

It is an interprime number because it is at equal distance from previous prime (12212399) and next prime (12212407).

It is not a de Polignac number, because 12212403 - 2² = 12212399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12212407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13788 + ... + 14646.

It is an arithmetic number, because the mean of its divisors is an integer number (1166160).

Almost surely, 2^12212403 is an apocalyptic number.

12212403 is a deficient number, since it is larger than the sum of its proper divisors (6446157).

12212403 is an equidigital number, since it uses as much as digits as its factorization.

12212403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12212403 is about 3494.6248725722. The cubic root of 12212403 is about 230.2857381269.

Adding to 12212403 its reverse (30421221), we get a palindrome (42633624).

The spelling of 12212403 in words is "twelve million, two hundred twelve thousand, four hundred three".