220201840021 has 8 divisors (see below), whose sum is σ = 234122341464. Its totient is φ = 206388833280.

The previous prime is 220201839967. The next prime is 220201840049. The reversal of 220201840021 is 120048102022.

220201840021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 65426477796 + 154775362225 = 255786^2 + 393415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220201840021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220201839974 and 220201840001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220201840121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26869450 + ... + 26877643.

It is an arithmetic number, because the mean of its divisors is an integer number (29265292683).

Almost surely, 2^220201840021 is an apocalyptic number.

It is an amenable number.

220201840021 is a deficient number, since it is larger than the sum of its proper divisors (13920501443).

220201840021 is a wasteful number, since it uses less digits than its factorization.

220201840021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53747351.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 220201840021 its reverse (120048102022), we get a palindrome (340249942043).

The spelling of 220201840021 in words is "two hundred twenty billion, two hundred one million, eight hundred forty thousand, twenty-one".