111122102100221 has 4 divisors (see below), whose sum is σ = 111128416950012. Its totient is φ = 111115787250432.

The previous prime is 111122102100199. The next prime is 111122102100223. The reversal of 111122102100221 is 122001201221111.

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 31841135412025 + 79280966688196 = 5642795^2 + 8903986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111122102100221 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 111122102100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122102100223) 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, 3157398500 + ... + 3157433693.

It is an arithmetic number, because the mean of its divisors is an integer number (27782104237503).

Almost surely, 2^{111122102100221} is an apocalyptic number.

It is an amenable number.

111122102100221 is a deficient number, since it is larger than the sum of its proper divisors (6314849791).

111122102100221 is an equidigital number, since it uses as much as digits as its factorization.

111122102100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6314849790.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111122102100221 its reverse (122001201221111), we get a palindrome (233123303321332).

The spelling of 111122102100221 in words is "one hundred eleven trillion, one hundred twenty-two billion, one hundred two million, one hundred thousand, two hundred twenty-one".