220220100220021 has 16 divisors (see below), whose sum is σ = 243837050499648. Its totient is φ = 197202916310400.

The previous prime is 220220100220009. The next prime is 220220100220027. The reversal of 220220100220021 is 120022001022022.

220220100220021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220220100220021 - 2¹¹ = 220220100217973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220220100219977 and 220220100220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220220100220027) 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, 9079491 + ... + 22866511.

It is an arithmetic number, because the mean of its divisors is an integer number (15239815656228).

Almost surely, 2^{220220100220021} is an apocalyptic number.

It is an amenable number.

220220100220021 is a deficient number, since it is larger than the sum of its proper divisors (23616950279627).

220220100220021 is a wasteful number, since it uses less digits than its factorization.

220220100220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13808772.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 220220100220021 its reverse (120022001022022), we get a palindrome (340242101242043).

The spelling of 220220100220021 in words is "two hundred twenty trillion, two hundred twenty billion, one hundred million, two hundred twenty thousand, twenty-one".