1211123233 has 2 divisors, whose sum is σ = 1211123234. Its totient is φ = 1211123232.

The previous prime is 1211123209. The next prime is 1211123261. The reversal of 1211123233 is 3323211121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1009142289 + 201980944 = 31767^2 + 14212^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211123233 - 2²⁹ = 674252321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211123233.

It is not a weakly prime, because it can be changed into another prime (1211123203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605561616 + 605561617.

It is an arithmetic number, because the mean of its divisors is an integer number (605561617).

Almost surely, 2^1211123233 is an apocalyptic number.

It is an amenable number.

1211123233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211123233 is an equidigital number, since it uses as much as digits as its factorization.

1211123233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 1211123233 is about 34801.1958558898. The cubic root of 1211123233 is about 1065.9318647073.

Adding to 1211123233 its reverse (3323211121), we get a palindrome (4534334354).

It can be divided in two parts, 12111 and 23233, that added together give a square (35344 = 188²).

The spelling of 1211123233 in words is "one billion, two hundred eleven million, one hundred twenty-three thousand, two hundred thirty-three".