10220201221 has 2 divisors, whose sum is σ = 10220201222. Its totient is φ = 10220201220.

The previous prime is 10220201209. The next prime is 10220201231. The reversal of 10220201221 is 12210202201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9155810596 + 1064390625 = 95686^2 + 32625^2 .

It is a cyclic number.

It is not a de Polignac number, because 10220201221 - 2¹¹ = 10220199173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10220201231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110100610 + 5110100611.

It is an arithmetic number, because the mean of its divisors is an integer number (5110100611).

Almost surely, 2^10220201221 is an apocalyptic number.

It is an amenable number.

10220201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10220201221 is an equidigital number, since it uses as much as digits as its factorization.

10220201221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10220201221 its reverse (12210202201), we get a palindrome (22430403422).

The spelling of 10220201221 in words is "ten billion, two hundred twenty million, two hundred one thousand, two hundred twenty-one".