221011010201 has 2 divisors, whose sum is σ = 221011010202. Its totient is φ = 221011010200.

The previous prime is 221011010197. The next prime is 221011010249. The reversal of 221011010201 is 102010110122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165729595801 + 55281414400 = 407099^2 + 235120^2 .

It is a cyclic number.

It is not a de Polignac number, because 221011010201 - 2² = 221011010197 is a prime.

It is a super-3 number, since 3×221011010201³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (221011000201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505505100 + 110505505101.

It is an arithmetic number, because the mean of its divisors is an integer number (110505505101).

Almost surely, 2^221011010201 is an apocalyptic number.

It is an amenable number.

221011010201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221011010201 is an equidigital number, since it uses as much as digits as its factorization.

221011010201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221011010201 its reverse (102010110122), we get a palindrome (323021120323).

The spelling of 221011010201 in words is "two hundred twenty-one billion, eleven million, ten thousand, two hundred one".