1211233133 has 8 divisors (see below), whose sum is σ = 1323698976. Its totient is φ = 1099159600.

The previous prime is 1211233123. The next prime is 1211233139. The reversal of 1211233133 is 3313321121.

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

It is not a de Polignac number, because 1211233133 - 2¹⁰ = 1211232109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211233139) 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, 91598 + ... + 103983.

It is an arithmetic number, because the mean of its divisors is an integer number (165462372).

Almost surely, 2^1211233133 is an apocalyptic number.

It is an amenable number.

1211233133 is a deficient number, since it is larger than the sum of its proper divisors (112465843).

1211233133 is a wasteful number, since it uses less digits than its factorization.

1211233133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196155.

The product of its digits is 324, while the sum is 20.

The square root of 1211233133 is about 34802.7747888010. The cubic root of 1211233133 is about 1065.9641054035.

Adding to 1211233133 its reverse (3313321121), we get a palindrome (4524554254).

The spelling of 1211233133 in words is "one billion, two hundred eleven million, two hundred thirty-three thousand, one hundred thirty-three".