110202122221 has 4 divisors (see below), whose sum is σ = 111293232444. Its totient is φ = 109111012000.

The previous prime is 110202122213. The next prime is 110202122263. The reversal of 110202122221 is 122221202011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122221202011 = 101 ⋅1210110911.

It can be written as a sum of positive squares in 2 ways, for example, as 65518081225 + 44684040996 = 255965^2 + 211386^2 .

It is a cyclic number.

It is not a de Polignac number, because 110202122221 - 2³ = 110202122213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110202122195 and 110202122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110202122321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545554960 + ... + 545555161.

It is an arithmetic number, because the mean of its divisors is an integer number (27823308111).

Almost surely, 2^110202122221 is an apocalyptic number.

It is an amenable number.

110202122221 is a deficient number, since it is larger than the sum of its proper divisors (1091110223).

110202122221 is a wasteful number, since it uses less digits than its factorization.

110202122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091110222.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 110202122221 its reverse (122221202011), we get a palindrome (232423324232).

The spelling of 110202122221 in words is "one hundred ten billion, two hundred two million, one hundred twenty-two thousand, two hundred twenty-one".