10111220202221 has 2 divisors, whose sum is σ = 10111220202222. Its totient is φ = 10111220202220.

The previous prime is 10111220202079. The next prime is 10111220202227. The reversal of 10111220202221 is 12220202211101.

10111220202221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5396263956196 + 4714956246025 = 2322986^2 + 2171395^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111220202221 - 2²⁶ = 10111153093357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10111220202221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111220202227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055610101110 + 5055610101111.

It is an arithmetic number, because the mean of its divisors is an integer number (5055610101111).

Almost surely, 2^{10111220202221} is an apocalyptic number.

It is an amenable number.

10111220202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111220202221 is an equidigital number, since it uses as much as digits as its factorization.

10111220202221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10111220202221 its reverse (12220202211101), we get a palindrome (22331422413322).

The spelling of 10111220202221 in words is "ten trillion, one hundred eleven billion, two hundred twenty million, two hundred two thousand, two hundred twenty-one".