1211320033 has 12 divisors (see below), whose sum is σ = 1537186032. Its totient is φ = 943885320.

The previous prime is 1211320027. The next prime is 1211320043. The reversal of 1211320033 is 3300231121.

It is a de Polignac number, because none of the positive numbers 2^k-1211320033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211319989 and 1211320016.

It is not an unprimeable number, because it can be changed into a prime (1211320043) 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, 1123135 + ... + 1124212.

It is an arithmetic number, because the mean of its divisors is an integer number (128098836).

Almost surely, 2^1211320033 is an apocalyptic number.

It is an amenable number.

1211320033 is a deficient number, since it is larger than the sum of its proper divisors (325865999).

1211320033 is a wasteful number, since it uses less digits than its factorization.

1211320033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247372 (or 2247365 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1211320033 is about 34804.0232300807. The cubic root of 1211320033 is about 1065.9895973486.

Adding to 1211320033 its reverse (3300231121), we get a palindrome (4511551154).

The spelling of 1211320033 in words is "one billion, two hundred eleven million, three hundred twenty thousand, thirty-three".