11223123011 has 2 divisors, whose sum is σ = 11223123012. Its totient is φ = 11223123010.

The previous prime is 11223123001. The next prime is 11223123017. The reversal of 11223123011 is 11032132211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11223123011 is a prime.

It is a super-2 number, since 2×11223123011² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11223123017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611561505 + 5611561506.

It is an arithmetic number, because the mean of its divisors is an integer number (5611561506).

Almost surely, 2^11223123011 is an apocalyptic number.

11223123011 is a deficient number, since it is larger than the sum of its proper divisors (1).

11223123011 is an equidigital number, since it uses as much as digits as its factorization.

11223123011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11223123011 its reverse (11032132211), we get a palindrome (22255255222).

The spelling of 11223123011 in words is "eleven billion, two hundred twenty-three million, one hundred twenty-three thousand, eleven".