220100220021 has 16 divisors (see below), whose sum is σ = 320303812608. Its totient is φ = 133328223600.

The previous prime is 220100219987. The next prime is 220100220023. The reversal of 220100220021 is 120022001022.

It is not a de Polignac number, because 220100220021 - 2⁹ = 220100219509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220100219979 and 220100220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220100220023) 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, 1578325 + ... + 1712106.

It is an arithmetic number, because the mean of its divisors is an integer number (20018988288).

Almost surely, 2^220100220021 is an apocalyptic number.

It is an amenable number.

220100220021 is a deficient number, since it is larger than the sum of its proper divisors (100203592587).

220100220021 is a wasteful number, since it uses less digits than its factorization.

220100220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3292472.

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

Adding to 220100220021 its reverse (120022001022), we get a palindrome (340122221043).

The spelling of 220100220021 in words is "two hundred twenty billion, one hundred million, two hundred twenty thousand, twenty-one".