221101201201 has 2 divisors, whose sum is σ = 221101201202. Its totient is φ = 221101201200.

The previous prime is 221101201193. The next prime is 221101201253. The reversal of 221101201201 is 102102101122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202882680625 + 18218520576 = 450425^2 + 134976^2 .

It is a cyclic number.

It is not a de Polignac number, because 221101201201 - 2³ = 221101201193 is a prime.

It is not a weakly prime, because it can be changed into another prime (221101201271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110550600600 + 110550600601.

It is an arithmetic number, because the mean of its divisors is an integer number (110550600601).

Almost surely, 2^221101201201 is an apocalyptic number.

It is an amenable number.

221101201201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221101201201 is an equidigital number, since it uses as much as digits as its factorization.

221101201201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221101201201 its reverse (102102101122), we get a palindrome (323203302323).

The spelling of 221101201201 in words is "two hundred twenty-one billion, one hundred one million, two hundred one thousand, two hundred one".