220110202001021 has 2 divisors, whose sum is σ = 220110202001022. Its totient is φ = 220110202001020.

The previous prime is 220110202000993. The next prime is 220110202001023. The reversal of 220110202001021 is 120100202011022.

220110202001021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131669061381796 + 88441140619225 = 11474714^2 + 9404315^2 .

It is a cyclic number.

It is not a de Polignac number, because 220110202001021 - 2¹⁰ = 220110201999997 is a prime.

Together with 220110202001023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 220110202000987 and 220110202001005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220110202001023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110055101000510 + 110055101000511.

It is an arithmetic number, because the mean of its divisors is an integer number (110055101000511).

Almost surely, 2^{220110202001021} is an apocalyptic number.

It is an amenable number.

220110202001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220110202001021 is an equidigital number, since it uses as much as digits as its factorization.

220110202001021 is an evil number, because the sum of its binary digits is even.

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

Adding to 220110202001021 its reverse (120100202011022), we get a palindrome (340210404012043).

The spelling of 220110202001021 in words is "two hundred twenty trillion, one hundred ten billion, two hundred two million, one thousand, twenty-one".