220103200021 has 2 divisors, whose sum is σ = 220103200022. Its totient is φ = 220103200020.

The previous prime is 220103199997. The next prime is 220103200033. The reversal of 220103200021 is 120002301022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175280382225 + 44822817796 = 418665^2 + 211714^2 .

It is a cyclic number.

It is not a de Polignac number, because 220103200021 - 2⁷ = 220103199893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220103199974 and 220103200010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220103200081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110051600010 + 110051600011.

It is an arithmetic number, because the mean of its divisors is an integer number (110051600011).

Almost surely, 2^220103200021 is an apocalyptic number.

It is an amenable number.

220103200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220103200021 is an equidigital number, since it uses as much as digits as its factorization.

220103200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 220103200021 its reverse (120002301022), we get a palindrome (340105501043).

The spelling of 220103200021 in words is "two hundred twenty billion, one hundred three million, two hundred thousand, twenty-one".