111100212100221 has 8 divisors (see below), whose sum is σ = 148133965057344. Its totient is φ = 74066633604960.

The previous prime is 111100212100219. The next prime is 111100212100231. The reversal of 111100212100221 is 122001212001111.

It is a happy number.

111100212100221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 111100212100221 - 2¹ = 111100212100219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111100212100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100212100231) 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, 42122256 + ... + 44682041.

It is an arithmetic number, because the mean of its divisors is an integer number (18516745632168).

Almost surely, 2^{111100212100221} is an apocalyptic number.

It is an amenable number.

111100212100221 is a deficient number, since it is larger than the sum of its proper divisors (37033752957123).

111100212100221 is an equidigital number, since it uses as much as digits as its factorization.

111100212100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87230931.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111100212100221 its reverse (122001212001111), we get a palindrome (233101424101332).

The spelling of 111100212100221 in words is "one hundred eleven trillion, one hundred billion, two hundred twelve million, one hundred thousand, two hundred twenty-one".