11821123 has 2 divisors, whose sum is σ = 11821124. Its totient is φ = 11821122.

The previous prime is 11821081. The next prime is 11821127. The reversal of 11821123 is 32112811.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11821123 is a prime.

It is a super-2 number, since 2×11821123² = 279477897962258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11821123.

It is not a weakly prime, because it can be changed into another prime (11821127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5910561 + 5910562.

It is an arithmetic number, because the mean of its divisors is an integer number (5910562).

Almost surely, 2^11821123 is an apocalyptic number.

11821123 is a deficient number, since it is larger than the sum of its proper divisors (1).

11821123 is an equidigital number, since it uses as much as digits as its factorization.

11821123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 19.

The square root of 11821123 is about 3438.1860042761. The cubic root of 11821123 is about 227.7995763570.

Adding to 11821123 its reverse (32112811), we get a palindrome (43933934).

The spelling of 11821123 in words is "eleven million, eight hundred twenty-one thousand, one hundred twenty-three".