220021330232021 has 2 divisors, whose sum is σ = 220021330232022. Its totient is φ = 220021330232020.

The previous prime is 220021330232003. The next prime is 220021330232027. The reversal of 220021330232021 is 120232033120022.

220021330232021 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., 215062518300100 + 4958811931921 = 14665010^2 + 2226839^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021330232021 - 2¹⁰ = 220021330230997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220021330232027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010665116010 + 110010665116011.

It is an arithmetic number, because the mean of its divisors is an integer number (110010665116011).

Almost surely, 2^{220021330232021} is an apocalyptic number.

It is an amenable number.

220021330232021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021330232021 is an equidigital number, since it uses as much as digits as its factorization.

220021330232021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 220021330232021 its reverse (120232033120022), we get a palindrome (340253363352043).

The spelling of 220021330232021 in words is "two hundred twenty trillion, twenty-one billion, three hundred thirty million, two hundred thirty-two thousand, twenty-one".