10122202211221 has 2 divisors, whose sum is σ = 10122202211222. Its totient is φ = 10122202211220.

The previous prime is 10122202211213. The next prime is 10122202211243. The reversal of 10122202211221 is 12211220222101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7515882563121 + 2606319648100 = 2741511^2 + 1614410^2 .

It is a cyclic number.

It is not a de Polignac number, because 10122202211221 - 2³ = 10122202211213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10122202211621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5061101105610 + 5061101105611.

It is an arithmetic number, because the mean of its divisors is an integer number (5061101105611).

Almost surely, 2^{10122202211221} is an apocalyptic number.

It is an amenable number.

10122202211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10122202211221 is an equidigital number, since it uses as much as digits as its factorization.

10122202211221 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 19.

Adding to 10122202211221 its reverse (12211220222101), we get a palindrome (22333422433322).

The spelling of 10122202211221 in words is "ten trillion, one hundred twenty-two billion, two hundred two million, two hundred eleven thousand, two hundred twenty-one".