220202104021 has 2 divisors, whose sum is σ = 220202104022. Its totient is φ = 220202104020.

The previous prime is 220202103959. The next prime is 220202104033. The reversal of 220202104021 is 120401202022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220112043921 + 90060100 = 469161^2 + 9490^2 .

It is a cyclic number.

It is not a de Polignac number, because 220202104021 - 2¹⁹ = 220201579733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220202103986 and 220202104004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220202114021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110101052010 + 110101052011.

It is an arithmetic number, because the mean of its divisors is an integer number (110101052011).

Almost surely, 2^220202104021 is an apocalyptic number.

It is an amenable number.

220202104021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220202104021 is an equidigital number, since it uses as much as digits as its factorization.

220202104021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 220202104021 its reverse (120401202022), we get a palindrome (340603306043).

The spelling of 220202104021 in words is "two hundred twenty billion, two hundred two million, one hundred four thousand, twenty-one".