1111320021223 has 4 divisors (see below), whose sum is σ = 1111322530120. Its totient is φ = 1111317512328.

The previous prime is 1111320021199. The next prime is 1111320021277. The reversal of 1111320021223 is 3221200231111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111320021223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111320021223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111320021023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392688 + ... + 1541701.

It is an arithmetic number, because the mean of its divisors is an integer number (277830632530).

Almost surely, 2^{1111320021223} is an apocalyptic number.

1111320021223 is a deficient number, since it is larger than the sum of its proper divisors (2508897).

1111320021223 is an equidigital number, since it uses as much as digits as its factorization.

1111320021223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508896.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1111320021223 its reverse (3221200231111), we get a palindrome (4332520252334).

The spelling of 1111320021223 in words is "one trillion, one hundred eleven billion, three hundred twenty million, twenty-one thousand, two hundred twenty-three".