220110020021 has 4 divisors (see below), whose sum is σ = 220166017344. Its totient is φ = 220054022700.

The previous prime is 220110019999. The next prime is 220110020027. The reversal of 220110020021 is 120020011022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220110020021 - 2⁶ = 220110019957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220110019984 and 220110020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220110020027) 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, 27992765 + ... + 28000626.

It is an arithmetic number, because the mean of its divisors is an integer number (55041504336).

Almost surely, 2^220110020021 is an apocalyptic number.

It is an amenable number.

220110020021 is a deficient number, since it is larger than the sum of its proper divisors (55997323).

220110020021 is an equidigital number, since it uses as much as digits as its factorization.

220110020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55997322.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220110020021 its reverse (120020011022), we get a palindrome (340130031043).

The spelling of 220110020021 in words is "two hundred twenty billion, one hundred ten million, twenty thousand, twenty-one".