1311221003 has 8 divisors (see below), whose sum is σ = 1331366400. Its totient is φ = 1291218408.

The previous prime is 1311220979. The next prime is 1311221039. The reversal of 1311221003 is 3001221131.

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 1311221003 - 2⁸ = 1311220747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311224003) 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, 17123 + ... + 53996.

It is an arithmetic number, because the mean of its divisors is an integer number (166420800).

Almost surely, 2^1311221003 is an apocalyptic number.

1311221003 is a deficient number, since it is larger than the sum of its proper divisors (20145397).

1311221003 is a wasteful number, since it uses less digits than its factorization.

1311221003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71401.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1311221003 is about 36210.7857274597. The cubic root of 1311221003 is about 1094.5240254610.

Adding to 1311221003 its reverse (3001221131), we get a palindrome (4312442134).

The spelling of 1311221003 in words is "one billion, three hundred eleven million, two hundred twenty-one thousand, three".