10202202201221 has 2 divisors, whose sum is σ = 10202202201222. Its totient is φ = 10202202201220.

The previous prime is 10202202201211. The next prime is 10202202201251. The reversal of 10202202201221 is 12210220220201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7747794312196 + 2454407889025 = 2783486^2 + 1566655^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202202201221 - 2⁶ = 10202202201157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10202202201221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10202202201211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101101100610 + 5101101100611.

It is an arithmetic number, because the mean of its divisors is an integer number (5101101100611).

Almost surely, 2^{10202202201221} is an apocalyptic number.

It is an amenable number.

10202202201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202202201221 is an equidigital number, since it uses as much as digits as its factorization.

10202202201221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 10202202201221 its reverse (12210220220201), we get a palindrome (22412422421422).

The spelling of 10202202201221 in words is "ten trillion, two hundred two billion, two hundred two million, two hundred one thousand, two hundred twenty-one".