2112201110221 has 4 divisors (see below), whose sum is σ = 2112317509500. Its totient is φ = 2112084710944.

The previous prime is 2112201110219. The next prime is 2112201110251. The reversal of 2112201110221 is 1220111022112.

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 854674364196 + 1257526746025 = 924486^2 + 1121395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112201110221 - 2¹ = 2112201110219 is a prime.

It is a super-2 number, since 2×2112201110221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112201110195 and 2112201110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112201110251) 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, 58172416 + ... + 58208713.

It is an arithmetic number, because the mean of its divisors is an integer number (528079377375).

Almost surely, 2^{2112201110221} is an apocalyptic number.

It is an amenable number.

2112201110221 is a deficient number, since it is larger than the sum of its proper divisors (116399279).

2112201110221 is a wasteful number, since it uses less digits than its factorization.

2112201110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116399278.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2112201110221 its reverse (1220111022112), we get a palindrome (3332312132333).

The spelling of 2112201110221 in words is "two trillion, one hundred twelve billion, two hundred one million, one hundred ten thousand, two hundred twenty-one".