221021122201 has 8 divisors (see below), whose sum is σ = 241280599104. Its totient is φ = 200789419920.

The previous prime is 221021122159. The next prime is 221021122237. The reversal of 221021122201 is 102221120122.

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 a de Polignac number, because none of the positive numbers 2^k-221021122201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221021132201) 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, 6927010 + ... + 6958843.

It is an arithmetic number, because the mean of its divisors is an integer number (30160074888).

Almost surely, 2^221021122201 is an apocalyptic number.

It is an amenable number.

221021122201 is a deficient number, since it is larger than the sum of its proper divisors (20259476903).

221021122201 is a wasteful number, since it uses less digits than its factorization.

221021122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13887311.

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

Adding to 221021122201 its reverse (102221120122), we get a palindrome (323242242323).

The spelling of 221021122201 in words is "two hundred twenty-one billion, twenty-one million, one hundred twenty-two thousand, two hundred one".