220001002020021 has 16 divisors (see below), whose sum is σ = 293633390539584. Its totient is φ = 146517978607104.

The previous prime is 220001002020011. The next prime is 220001002020109. The reversal of 220001002020021 is 120020200100022.

It is not a de Polignac number, because 220001002020021 - 2¹³ = 220001002011829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220001002019979 and 220001002020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001002020011) 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, 207264370 + ... + 208323116.

It is an arithmetic number, because the mean of its divisors is an integer number (18352086908724).

Almost surely, 2^{220001002020021} is an apocalyptic number.

It is an amenable number.

220001002020021 is a deficient number, since it is larger than the sum of its proper divisors (73632388519563).

220001002020021 is a wasteful number, since it uses less digits than its factorization.

220001002020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129220.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 220001002020021 its reverse (120020200100022), we get a palindrome (340021202120043).

The spelling of 220001002020021 in words is "two hundred twenty trillion, one billion, two million, twenty thousand, twenty-one".