201112220221 has 4 divisors (see below), whose sum is σ = 219395149344. Its totient is φ = 182829291100.

The previous prime is 201112220191. The next prime is 201112220227. The reversal of 201112220221 is 122022211102.

It is a happy number.

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 201112220221 - 2²¹ = 201110123069 is a prime.

It is a super-4 number, since 4×201112220221⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201112220195 and 201112220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201112220227) 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, 9141464545 + ... + 9141464566.

It is an arithmetic number, because the mean of its divisors is an integer number (54848787336).

Almost surely, 2^201112220221 is an apocalyptic number.

It is an amenable number.

201112220221 is a deficient number, since it is larger than the sum of its proper divisors (18282929123).

201112220221 is a wasteful number, since it uses less digits than its factorization.

201112220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18282929122.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201112220221 its reverse (122022211102), we get a palindrome (323134431323).

The spelling of 201112220221 in words is "two hundred one billion, one hundred twelve million, two hundred twenty thousand, two hundred twenty-one".