111211122001 has 8 divisors (see below), whose sum is σ = 128888544384. Its totient is φ = 93981229440.

The previous prime is 111211121977. The next prime is 111211122017. The reversal of 111211122001 is 100221112111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111211122001 - 2⁵ = 111211121969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111211125001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111881920 + ... + 111882913.

It is an arithmetic number, because the mean of its divisors is an integer number (16111068048).

Almost surely, 2^111211122001 is an apocalyptic number.

It is an amenable number.

111211122001 is a deficient number, since it is larger than the sum of its proper divisors (17677422383).

111211122001 is an equidigital number, since it uses as much as digits as its factorization.

111211122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223764911.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111211122001 its reverse (100221112111), we get a palindrome (211432234112).

The spelling of 111211122001 in words is "one hundred eleven billion, two hundred eleven million, one hundred twenty-two thousand, one".