10201112221 has 2 divisors, whose sum is σ = 10201112222. Its totient is φ = 10201112220.

The previous prime is 10201112219. The next prime is 10201112231. The reversal of 10201112221 is 12221110201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6896472025 + 3304640196 = 83045^2 + 57486^2 .

It is a cyclic number.

It is not a de Polignac number, because 10201112221 - 2¹ = 10201112219 is a prime.

Together with 10201112219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10201112231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100556110 + 5100556111.

It is an arithmetic number, because the mean of its divisors is an integer number (5100556111).

Almost surely, 2^10201112221 is an apocalyptic number.

It is an amenable number.

10201112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201112221 is an equidigital number, since it uses as much as digits as its factorization.

10201112221 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 10201112221 its reverse (12221110201), we get a palindrome (22422222422).

The spelling of 10201112221 in words is "ten billion, two hundred one million, one hundred twelve thousand, two hundred twenty-one".