221220211201 has 8 divisors (see below), whose sum is σ = 241361848224. Its totient is φ = 201083692320.

The previous prime is 221220211153. The next prime is 221220211211. The reversal of 221220211201 is 102112022122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221220211201 - 2⁹ = 221220210689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221220211211) 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, 1188876 + ... + 1362301.

It is an arithmetic number, because the mean of its divisors is an integer number (30170231028).

Almost surely, 2^221220211201 is an apocalyptic number.

It is an amenable number.

221220211201 is a deficient number, since it is larger than the sum of its proper divisors (20141637023).

221220211201 is a wasteful number, since it uses less digits than its factorization.

221220211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559071.

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

Adding to 221220211201 its reverse (102112022122), we get a palindrome (323332233323).

The spelling of 221220211201 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, two hundred one".