110202111221 has 2 divisors, whose sum is σ = 110202111222. Its totient is φ = 110202111220.

The previous prime is 110202111209. The next prime is 110202111269. The reversal of 110202111221 is 122111202011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70047562225 + 40154548996 = 264665^2 + 200386^2 .

It is a cyclic number.

It is not a de Polignac number, because 110202111221 - 2³⁰ = 109128369397 is a prime.

It is a super-2 number, since 2×110202111221² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 110202111196 and 110202111205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110202111281) 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, 55101055610 + 55101055611.

It is an arithmetic number, because the mean of its divisors is an integer number (55101055611).

Almost surely, 2^110202111221 is an apocalyptic number.

It is an amenable number.

110202111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

110202111221 is an equidigital number, since it uses as much as digits as its factorization.

110202111221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 110202111221 its reverse (122111202011), we get a palindrome (232313313232).

The spelling of 110202111221 in words is "one hundred ten billion, two hundred two million, one hundred eleven thousand, two hundred twenty-one".