220110221021 has 4 divisors (see below), whose sum is σ = 220111254012. Its totient is φ = 220109188032.

The previous prime is 220110221017. The next prime is 220110221029. The reversal of 220110221021 is 120122011022.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 29451364996 + 190658856025 = 171614^2 + 436645^2 .

It is a cyclic number.

It is not a de Polignac number, because 220110221021 - 2² = 220110221017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220110220987 and 220110221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220110221029) 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, 65756 + ... + 666741.

It is an arithmetic number, because the mean of its divisors is an integer number (55027813503).

Almost surely, 2^220110221021 is an apocalyptic number.

It is an amenable number.

220110221021 is a deficient number, since it is larger than the sum of its proper divisors (1032991).

220110221021 is an equidigital number, since it uses as much as digits as its factorization.

220110221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032990.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 220110221021 its reverse (120122011022), we get a palindrome (340232232043).

The spelling of 220110221021 in words is "two hundred twenty billion, one hundred ten million, two hundred twenty-one thousand, twenty-one".