11001222123 has 16 divisors (see below), whose sum is σ = 15663590400. Its totient is φ = 6852817440.

The previous prime is 11001222107. The next prime is 11001222163. The reversal of 11001222123 is 32122210011.

It is not a de Polignac number, because 11001222123 - 2⁴ = 11001222107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11001222163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2036833 + ... + 2042226.

It is an arithmetic number, because the mean of its divisors is an integer number (978974400).

Almost surely, 2^11001222123 is an apocalyptic number.

11001222123 is a deficient number, since it is larger than the sum of its proper divisors (4662368277).

11001222123 is a wasteful number, since it uses less digits than its factorization.

11001222123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4079122.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 11001222123 its reverse (32122210011), we get a palindrome (43123432134).

The spelling of 11001222123 in words is "eleven billion, one million, two hundred twenty-two thousand, one hundred twenty-three".