1312221203 has 8 divisors (see below), whose sum is σ = 1379725680. Its totient is φ = 1246200480.

The previous prime is 1312221199. The next prime is 1312221233. The reversal of 1312221203 is 3021222131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312221203 - 2² = 1312221199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312221233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369125 + ... + 372662.

It is an arithmetic number, because the mean of its divisors is an integer number (172465710).

Almost surely, 2^1312221203 is an apocalyptic number.

1312221203 is a deficient number, since it is larger than the sum of its proper divisors (67504477).

1312221203 is an equidigital number, since it uses as much as digits as its factorization.

1312221203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741877.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1312221203 is about 36224.5938969645. The cubic root of 1312221203 is about 1094.8022558760.

Adding to 1312221203 its reverse (3021222131), we get a palindrome (4333443334).

The spelling of 1312221203 in words is "one billion, three hundred twelve million, two hundred twenty-one thousand, two hundred three".