220012012021 has 2 divisors, whose sum is σ = 220012012022. Its totient is φ = 220012012020.

The previous prime is 220012012009. The next prime is 220012012069. The reversal of 220012012021 is 120210210022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219760313796 + 251698225 = 468786^2 + 15865^2 .

It is a cyclic number.

It is not a de Polignac number, because 220012012021 - 2⁷ = 220012011893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220012011992 and 220012012010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220012012721) 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 as a sum of consecutive naturals, namely, 110006006010 + 110006006011.

It is an arithmetic number, because the mean of its divisors is an integer number (110006006011).

Almost surely, 2^220012012021 is an apocalyptic number.

It is an amenable number.

220012012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220012012021 is an equidigital number, since it uses as much as digits as its factorization.

220012012021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 220012012021 its reverse (120210210022), we get a palindrome (340222222043).

The spelling of 220012012021 in words is "two hundred twenty billion, twelve million, twelve thousand, twenty-one".