220202101021 has 12 divisors (see below), whose sum is σ = 257785024188. Its totient is φ = 187542456192.

The previous prime is 220202100977. The next prime is 220202101087. The reversal of 220202101021 is 120101202022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 141311335396 + 78890765625 = 375914^2 + 280875^2 .

It is not a de Polignac number, because 220202101021 - 2⁹ = 220202100509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220202100992 and 220202101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220202104021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14304156 + ... + 14319541.

It is an arithmetic number, because the mean of its divisors is an integer number (21482085349).

Almost surely, 2^220202101021 is an apocalyptic number.

It is an amenable number.

220202101021 is a deficient number, since it is larger than the sum of its proper divisors (37582923167).

220202101021 is a wasteful number, since it uses less digits than its factorization.

220202101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28623868 (or 28623861 counting only the distinct ones).

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

Adding to 220202101021 its reverse (120101202022), we get a palindrome (340303303043).

The spelling of 220202101021 in words is "two hundred twenty billion, two hundred two million, one hundred one thousand, twenty-one".