11111223001 has 16 divisors (see below), whose sum is σ = 12003997824. Its totient is φ = 10245590784.

The previous prime is 11111222977. The next prime is 11111223007. The reversal of 11111223001 is 10032211111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11111223001 - 2¹⁹ = 11110698713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111223007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 646546 + ... + 663508.

It is an arithmetic number, because the mean of its divisors is an integer number (750249864).

Almost surely, 2^11111223001 is an apocalyptic number.

It is an amenable number.

11111223001 is a deficient number, since it is larger than the sum of its proper divisors (892774823).

11111223001 is a wasteful number, since it uses less digits than its factorization.

11111223001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17760.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11111223001 its reverse (10032211111), we get a palindrome (21143434112).

The spelling of 11111223001 in words is "eleven billion, one hundred eleven million, two hundred twenty-three thousand, one".