11312012233 has 2 divisors, whose sum is σ = 11312012234. Its totient is φ = 11312012232.

The previous prime is 11312012209. The next prime is 11312012249. The reversal of 11312012233 is 33221021311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11208033424 + 103978809 = 105868^2 + 10197^2 .

It is a cyclic number.

It is not a de Polignac number, because 11312012233 - 2²¹ = 11309915081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11312012233.

It is not a weakly prime, because it can be changed into another prime (11312013233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656006116 + 5656006117.

It is an arithmetic number, because the mean of its divisors is an integer number (5656006117).

Almost surely, 2^11312012233 is an apocalyptic number.

It is an amenable number.

11312012233 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312012233 is an equidigital number, since it uses as much as digits as its factorization.

11312012233 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11312012233 its reverse (33221021311), we get a palindrome (44533033544).

The spelling of 11312012233 in words is "eleven billion, three hundred twelve million, twelve thousand, two hundred thirty-three".