11311222403 has 4 divisors (see below), whose sum is σ = 12181316448. Its totient is φ = 10441128360.

The previous prime is 11311222343. The next prime is 11311222547. The reversal of 11311222403 is 30422211311.

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

It is not a de Polignac number, because 11311222403 - 2⁶ = 11311222339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311225403) 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, 435047003 + ... + 435047028.

It is an arithmetic number, because the mean of its divisors is an integer number (3045329112).

Almost surely, 2^11311222403 is an apocalyptic number.

11311222403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11311222403 is a deficient number, since it is larger than the sum of its proper divisors (870094045).

11311222403 is an equidigital number, since it uses as much as digits as its factorization.

11311222403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870094044.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 11311222403 its reverse (30422211311), we get a palindrome (41733433714).

The spelling of 11311222403 in words is "eleven billion, three hundred eleven million, two hundred twenty-two thousand, four hundred three".