11220001123 has 4 divisors (see below), whose sum is σ = 11221167880. Its totient is φ = 11218834368.

The previous prime is 11220001109. The next prime is 11220001127. The reversal of 11220001123 is 32110002211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11220001123 - 2⁹ = 11220000611 is a prime.

It is a super-2 number, since 2×11220001123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11220001127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568833 + ... + 588226.

It is an arithmetic number, because the mean of its divisors is an integer number (2805291970).

Almost surely, 2^11220001123 is an apocalyptic number.

11220001123 is a deficient number, since it is larger than the sum of its proper divisors (1166757).

11220001123 is an equidigital number, since it uses as much as digits as its factorization.

11220001123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166756.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11220001123 its reverse (32110002211), we get a palindrome (43330003334).

The spelling of 11220001123 in words is "eleven billion, two hundred twenty million, one thousand, one hundred twenty-three".