221102120110121 has 2 divisors, whose sum is σ = 221102120110122. Its totient is φ = 221102120110120.

The previous prime is 221102120110097. The next prime is 221102120110139. The reversal of 221102120110121 is 121011021201122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133270285275625 + 87831834834496 = 11544275^2 + 9371864^2 .

It is a cyclic number.

It is not a de Polignac number, because 221102120110121 - 2¹⁴ = 221102120093737 is a prime.

It is a super-2 number, since 2×221102120110121² (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 221102120110121.

It is not a weakly prime, because it can be changed into another prime (221102120116121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551060055060 + 110551060055061.

It is an arithmetic number, because the mean of its divisors is an integer number (110551060055061).

Almost surely, 2^{221102120110121} is an apocalyptic number.

It is an amenable number.

221102120110121 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102120110121 is an equidigital number, since it uses as much as digits as its factorization.

221102120110121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221102120110121 its reverse (121011021201122), we get a palindrome (342113141311243).

It can be divided in two parts, 2211021201101 and 21, that added together give a palindrome (2211021201122).

The spelling of 221102120110121 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred twenty million, one hundred ten thousand, one hundred twenty-one".