110021210202221 has 2 divisors, whose sum is σ = 110021210202222. Its totient is φ = 110021210202220.

The previous prime is 110021210202173. The next prime is 110021210202227. The reversal of 110021210202221 is 122202012120011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98880868780996 + 11140341421225 = 9943886^2 + 3337715^2 .

It is a cyclic number.

It is not a de Polignac number, because 110021210202221 - 2¹⁰ = 110021210201197 is a prime.

It is a super-2 number, since 2×110021210202221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 110021210202221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110021210202227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55010605101110 + 55010605101111.

It is an arithmetic number, because the mean of its divisors is an integer number (55010605101111).

Almost surely, 2^{110021210202221} is an apocalyptic number.

It is an amenable number.

110021210202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

110021210202221 is an equidigital number, since it uses as much as digits as its factorization.

110021210202221 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 110021210202221 its reverse (122202012120011), we get a palindrome (232223222322232).

The spelling of 110021210202221 in words is "one hundred ten trillion, twenty-one billion, two hundred ten million, two hundred two thousand, two hundred twenty-one".