211122102112221 has 4 divisors (see below), whose sum is σ = 281496136149632. Its totient is φ = 140748068074812.

The previous prime is 211122102112219. The next prime is 211122102112261. The reversal of 211122102112221 is 122211201221112.

211122102112221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 211122102112221 - 2¹ = 211122102112219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122102112261) 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, 35187017018701 + ... + 35187017018706.

It is an arithmetic number, because the mean of its divisors is an integer number (70374034037408).

Almost surely, 2^{211122102112221} is an apocalyptic number.

It is an amenable number.

211122102112221 is a deficient number, since it is larger than the sum of its proper divisors (70374034037411).

211122102112221 is an equidigital number, since it uses as much as digits as its factorization.

211122102112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70374034037410.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 211122102112221 its reverse (122211201221112), we get a palindrome (333333303333333).

The spelling of 211122102112221 in words is "two hundred eleven trillion, one hundred twenty-two billion, one hundred two million, one hundred twelve thousand, two hundred twenty-one".