1211312003 has 12 divisors (see below), whose sum is σ = 1332771720. Its totient is φ = 1100093280.

The previous prime is 1211311993. The next prime is 1211312009. The reversal of 1211312003 is 3002131121.

It is not a de Polignac number, because 1211312003 - 2⁶ = 1211311939 is a prime.

It is a super-2 number, since 2×1211312003² = 2934553537223744018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211312009) 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 11 ways as a sum of consecutive naturals, for example, 132176 + ... + 141042.

It is an arithmetic number, because the mean of its divisors is an integer number (111064310).

Almost surely, 2^1211312003 is an apocalyptic number.

1211312003 is a deficient number, since it is larger than the sum of its proper divisors (121459717).

1211312003 is a wasteful number, since it uses less digits than its factorization.

1211312003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10018 (or 10007 counting only the distinct ones).

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

The square root of 1211312003 is about 34803.9078696631. The cubic root of 1211312003 is about 1065.9872418149.

Adding to 1211312003 its reverse (3002131121), we get a palindrome (4213443124).

The spelling of 1211312003 in words is "one billion, two hundred eleven million, three hundred twelve thousand, three".