111012200000221 has 4 divisors (see below), whose sum is σ = 119551600000252. Its totient is φ = 102472800000192.

The previous prime is 111012200000179. The next prime is 111012200000231. The reversal of 111012200000221 is 122000002210111.

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 15601599412996 + 95410600587225 = 3949886^2 + 9767835^2 .

It is a cyclic number.

It is not a de Polignac number, because 111012200000221 - 2³⁹ = 110462444186333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 8539400000017 = 111012200000221 / (1 + 1 + 1 + 0 + 1 + 2 + 2 + 0 + 0 + 0 + 0 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012200000231) 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, 4269699999996 + ... + 4269700000021.

It is an arithmetic number, because the mean of its divisors is an integer number (29887900000063).

Almost surely, 2^{111012200000221} is an apocalyptic number.

It is an amenable number.

111012200000221 is a deficient number, since it is larger than the sum of its proper divisors (8539400000031).

111012200000221 is an equidigital number, since it uses as much as digits as its factorization.

111012200000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8539400000030.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111012200000221 its reverse (122000002210111), we get a palindrome (233012202210332).

The spelling of 111012200000221 in words is "one hundred eleven trillion, twelve billion, two hundred million, two hundred twenty-one", and thus it is an aban number.