110220202021 has 4 divisors (see below), whose sum is σ = 110221328044. Its totient is φ = 110219076000.

The previous prime is 110220202019. The next prime is 110220202033. The reversal of 110220202021 is 120202022011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56352112996 + 53868089025 = 237386^2 + 232095^2 .

It is a cyclic number.

It is not a de Polignac number, because 110220202021 - 2¹ = 110220202019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110220201992 and 110220202010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110220202921) 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, 400560 + ... + 617161.

It is an arithmetic number, because the mean of its divisors is an integer number (27555332011).

Almost surely, 2^110220202021 is an apocalyptic number.

It is an amenable number.

110220202021 is a deficient number, since it is larger than the sum of its proper divisors (1126023).

110220202021 is a wasteful number, since it uses less digits than its factorization.

110220202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126022.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 110220202021 its reverse (120202022011), we get a palindrome (230422224032).

The spelling of 110220202021 in words is "one hundred ten billion, two hundred twenty million, two hundred two thousand, twenty-one".