11220203423 has 16 divisors (see below), whose sum is σ = 13312307232. Its totient is φ = 9322320000.

The previous prime is 11220203419. The next prime is 11220203503. The reversal of 11220203423 is 32430202211.

It is a cyclic number.

It is not a de Polignac number, because 11220203423 - 2² = 11220203419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220203395 and 11220203404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220206423) 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, 373988 + ... + 402873.

It is an arithmetic number, because the mean of its divisors is an integer number (832019202).

Almost surely, 2^11220203423 is an apocalyptic number.

11220203423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11220203423 is a deficient number, since it is larger than the sum of its proper divisors (2092103809).

11220203423 is a wasteful number, since it uses less digits than its factorization.

11220203423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776986.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 11220203423 its reverse (32430202211), we get a palindrome (43650405634).

The spelling of 11220203423 in words is "eleven billion, two hundred twenty million, two hundred three thousand, four hundred twenty-three".