211112102221 has 4 divisors (see below), whose sum is σ = 211113421792. Its totient is φ = 211110782652.

The previous prime is 211112102209. The next prime is 211112102251. The reversal of 211112102221 is 122201211112.

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 a cyclic number.

It is not a de Polignac number, because 211112102221 - 2¹³ = 211112094029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211112102195 and 211112102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112102251) 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, 380361 + ... + 752926.

It is an arithmetic number, because the mean of its divisors is an integer number (52778355448).

Almost surely, 2^211112102221 is an apocalyptic number.

It is an amenable number.

211112102221 is a deficient number, since it is larger than the sum of its proper divisors (1319571).

211112102221 is a wasteful number, since it uses less digits than its factorization.

211112102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319570.

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

Adding to 211112102221 its reverse (122201211112), we get a palindrome (333313313333).

The spelling of 211112102221 in words is "two hundred eleven billion, one hundred twelve million, one hundred two thousand, two hundred twenty-one".