111011221001 has 4 divisors (see below), whose sum is σ = 111631395600. Its totient is φ = 110391046404.

The previous prime is 111011220989. The next prime is 111011221051. The reversal of 111011221001 is 100122110111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111011221001 - 2¹⁸ = 111010958857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111011221051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310087031 + ... + 310087388.

It is an arithmetic number, because the mean of its divisors is an integer number (27907848900).

Almost surely, 2^111011221001 is an apocalyptic number.

It is an amenable number.

111011221001 is a deficient number, since it is larger than the sum of its proper divisors (620174599).

111011221001 is an equidigital number, since it uses as much as digits as its factorization.

111011221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620174598.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111011221001 its reverse (100122110111), we get a palindrome (211133331112).

The spelling of 111011221001 in words is "one hundred eleven billion, eleven million, two hundred twenty-one thousand, one".