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12212003 = 19642737
BaseRepresentation
bin101110100101…
…011100100011
3211222102201102
4232211130203
511111241003
61113425015
7205541336
oct56453443
924872642
1012212003
116991071
12410b16b
1326b764b
14189c61d
151113588
hexba5723

12212003 has 4 divisors (see below), whose sum is σ = 12854760. Its totient is φ = 11569248.

The previous prime is 12211981. The next prime is 12212021. The reversal of 12212003 is 30021221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30021221 = 137219133.

It is a cyclic number.

It is not a de Polignac number, because 12212003 - 28 = 12211747 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12212063) 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 3 ways as a sum of consecutive naturals, for example, 321350 + ... + 321387.

It is an arithmetic number, because the mean of its divisors is an integer number (3213690).

Almost surely, 212212003 is an apocalyptic number.

12212003 is a deficient number, since it is larger than the sum of its proper divisors (642757).

12212003 is an equidigital number, since it uses as much as digits as its factorization.

12212003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642756.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 12212003 is about 3494.5676413542. The cubic root of 12212003 is about 230.2832238715.

Adding to 12212003 its reverse (30021221), we get a palindrome (42233224).

The spelling of 12212003 in words is "twelve million, two hundred twelve thousand, three".

Divisors: 1 19 642737 12212003