111122221000001 has 4 divisors (see below), whose sum is σ = 112222441010004. Its totient is φ = 110022000990000.

The previous prime is 111122220999919. The next prime is 111122221000057. The reversal of 111122221000001 is 100000122221111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 103414662490000 + 7707558510001 = 10169300^2 + 2776249^2 .

It is a cyclic number.

It is not a de Polignac number, because 111122221000001 - 2⁴⁶ = 40753476822337 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 111122221000001.

It is not an unprimeable number, because it can be changed into a prime (111122221000061) 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, 550110004850 + ... + 550110005051.

It is an arithmetic number, because the mean of its divisors is an integer number (28055610252501).

Almost surely, 2^{111122221000001} is an apocalyptic number.

It is an amenable number.

111122221000001 is a deficient number, since it is larger than the sum of its proper divisors (1100220010003).

111122221000001 is a wasteful number, since it uses less digits than its factorization.

111122221000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100220010002.

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

Adding to 111122221000001 its reverse (100000122221111), we get a palindrome (211122343221112).

The spelling of 111122221000001 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred twenty-one million, one", and thus it is an aban number.