111121222001 has 4 divisors (see below), whose sum is σ = 111156966900. Its totient is φ = 111085477104.

The previous prime is 111121221989. The next prime is 111121222067. The reversal of 111121222001 is 100222121111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100222121111 = 7 ⋅14317445873.

It can be written as a sum of positive squares in 2 ways, for example, as 7357350625 + 103763871376 = 85775^2 + 322124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111121222001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111121222501) 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, 17867786 + ... + 17874003.

It is an arithmetic number, because the mean of its divisors is an integer number (27789241725).

Almost surely, 2^111121222001 is an apocalyptic number.

It is an amenable number.

111121222001 is a deficient number, since it is larger than the sum of its proper divisors (35744899).

111121222001 is an equidigital number, since it uses as much as digits as its factorization.

111121222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35744898.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111121222001 its reverse (100222121111), we get a palindrome (211343343112).

The spelling of 111121222001 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, one".