110201211221 has 4 divisors (see below), whose sum is σ = 110202249612. Its totient is φ = 110200172832.

The previous prime is 110201211173. The next prime is 110201211259. The reversal of 110201211221 is 122112102011.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 122112102011 = 8839 ⋅13815149.

It can be written as a sum of positive squares in 2 ways, for example, as 60186808900 + 50014402321 = 245330^2 + 223639^2 .

It is a cyclic number.

It is not a de Polignac number, because 110201211221 - 2¹⁸ = 110200949077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110201211196 and 110201211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110201211121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339206 + ... + 579191.

It is an arithmetic number, because the mean of its divisors is an integer number (27550562403).

Almost surely, 2^110201211221 is an apocalyptic number.

It is an amenable number.

110201211221 is a deficient number, since it is larger than the sum of its proper divisors (1038391).

110201211221 is an equidigital number, since it uses as much as digits as its factorization.

110201211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038390.

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

Adding to 110201211221 its reverse (122112102011), we get a palindrome (232313313232).

The spelling of 110201211221 in words is "one hundred ten billion, two hundred one million, two hundred eleven thousand, two hundred twenty-one".