221102021201 has 2 divisors, whose sum is σ = 221102021202. Its totient is φ = 221102021200.

The previous prime is 221102021171. The next prime is 221102021213. The reversal of 221102021201 is 102120201122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156341950801 + 64760070400 = 395401^2 + 254480^2 .

It is a cyclic number.

It is not a de Polignac number, because 221102021201 - 2¹⁴ = 221102004817 is a prime.

It is a super-2 number, since 2×221102021201² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221102021281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551010600 + 110551010601.

It is an arithmetic number, because the mean of its divisors is an integer number (110551010601).

Almost surely, 2^221102021201 is an apocalyptic number.

It is an amenable number.

221102021201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102021201 is an equidigital number, since it uses as much as digits as its factorization.

221102021201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221102021201 its reverse (102120201122), we get a palindrome (323222222323).

The spelling of 221102021201 in words is "two hundred twenty-one billion, one hundred two million, twenty-one thousand, two hundred one".