220120233021 has 20 divisors (see below), whose sum is σ = 354115552252. Its totient is φ = 135458604288.

The previous prime is 220120233007. The next prime is 220120233089. The reversal of 220120233021 is 120332021022.

220120233021 is a `hidden beast` number, since 220 + 120 + 23 + 302 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 83094404121 + 137025828900 = 288261^2 + 370170^2 .

It is not a de Polignac number, because 220120233021 - 2⁹ = 220120232509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220120232985 and 220120233003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220120234021) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 104519476 + ... + 104521581.

Almost surely, 2^220120233021 is an apocalyptic number.

It is an amenable number.

220120233021 is a deficient number, since it is larger than the sum of its proper divisors (133995319231).

220120233021 is a wasteful number, since it uses less digits than its factorization.

220120233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209041082 (or 209041073 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 220120233021 its reverse (120332021022), we get a palindrome (340452254043).

The spelling of 220120233021 in words is "two hundred twenty billion, one hundred twenty million, two hundred thirty-three thousand, twenty-one".