1211100233 has 8 divisors (see below), whose sum is σ = 1431842880. Its totient is φ = 1002289680.

The previous prime is 1211100229. The next prime is 1211100239. The reversal of 1211100233 is 3320011121.

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

It is not a de Polignac number, because 1211100233 - 2² = 1211100229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211100239) 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, 2982803 + ... + 2983208.

It is an arithmetic number, because the mean of its divisors is an integer number (178980360).

Almost surely, 2^1211100233 is an apocalyptic number.

It is an amenable number.

1211100233 is a deficient number, since it is larger than the sum of its proper divisors (220742647).

1211100233 is an equidigital number, since it uses as much as digits as its factorization.

1211100233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5966047.

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

The square root of 1211100233 is about 34800.8654059062. The cubic root of 1211100233 is about 1065.9251170900.

Adding to 1211100233 its reverse (3320011121), we get a palindrome (4531111354).

The spelling of 1211100233 in words is "one billion, two hundred eleven million, one hundred thousand, two hundred thirty-three".