10220202111221 has 2 divisors, whose sum is σ = 10220202111222. Its totient is φ = 10220202111220.

The previous prime is 10220202111209. The next prime is 10220202111293. The reversal of 10220202111221 is 12211120202201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8077816622500 + 2142385488721 = 2842150^2 + 1463689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10220202111221 is a prime.

It is a super-2 number, since 2×10220202111221² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10220202111221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10220202113221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110101055610 + 5110101055611.

It is an arithmetic number, because the mean of its divisors is an integer number (5110101055611).

Almost surely, 2^{10220202111221} is an apocalyptic number.

It is an amenable number.

10220202111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10220202111221 is an equidigital number, since it uses as much as digits as its factorization.

10220202111221 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 10220202111221 its reverse (12211120202201), we get a palindrome (22431322313422).

The spelling of 10220202111221 in words is "ten trillion, two hundred twenty billion, two hundred two million, one hundred eleven thousand, two hundred twenty-one".