110220111111221 has 2 divisors, whose sum is σ = 110220111111222. Its totient is φ = 110220111111220.

The previous prime is 110220111111193. The next prime is 110220111111247. The reversal of 110220111111221 is 122111111022011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106468862640625 + 3751248470596 = 10318375^2 + 1936814^2 .

It is a cyclic number.

It is not a de Polignac number, because 110220111111221 - 2²² = 110220106916917 is a prime.

It is a super-2 number, since 2×110220111111221² (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 110220111111221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110220111114221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55110055555610 + 55110055555611.

It is an arithmetic number, because the mean of its divisors is an integer number (55110055555611).

Almost surely, 2^{110220111111221} is an apocalyptic number.

It is an amenable number.

110220111111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

110220111111221 is an equidigital number, since it uses as much as digits as its factorization.

110220111111221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 110220111111221 its reverse (122111111022011), we get a palindrome (232331222133232).

The spelling of 110220111111221 in words is "one hundred ten trillion, two hundred twenty billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty-one".