220020220021 has 16 divisors (see below), whose sum is σ = 258453175680. Its totient is φ = 183345750720.

The previous prime is 220020219997. The next prime is 220020220051. The reversal of 220020220021 is 120022020022.

It is a de Polignac number, because none of the positive numbers 2^k-220020220021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220020219983 and 220020220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020220051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11290 + ... + 663451.

It is an arithmetic number, because the mean of its divisors is an integer number (16153323480).

Almost surely, 2^220020220021 is an apocalyptic number.

It is an amenable number.

220020220021 is a deficient number, since it is larger than the sum of its proper divisors (38432955659).

220020220021 is a wasteful number, since it uses less digits than its factorization.

220020220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676044.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 220020220021 its reverse (120022020022), we get a palindrome (340042240043).

The spelling of 220020220021 in words is "two hundred twenty billion, twenty million, two hundred twenty thousand, twenty-one".