11220321123 has 56 divisors (see below), whose sum is σ = 19318294080. Its totient is φ = 6442202160.

The previous prime is 11220321103. The next prime is 11220321131. The reversal of 11220321123 is 32112302211.

11220321123 is a `hidden beast` number, since 1 + 1 + 220 + 321 + 123 = 666.

It is not a de Polignac number, because 11220321123 - 2⁶ = 11220321059 is a prime.

It is a super-2 number, since 2×11220321123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11220321096 and 11220321105.

It is not an unprimeable number, because it can be changed into a prime (11220321103) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 115540 + ... + 189182.

Almost surely, 2^11220321123 is an apocalyptic number.

11220321123 is a deficient number, since it is larger than the sum of its proper divisors (8097972957).

11220321123 is an equidigital number, since it uses as much as digits as its factorization.

11220321123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73691 (or 73676 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11220321123 its reverse (32112302211), we get a palindrome (43332623334).

The spelling of 11220321123 in words is "eleven billion, two hundred twenty million, three hundred twenty-one thousand, one hundred twenty-three".