220241021 has 16 divisors (see below), whose sum is σ = 295709568. Its totient is φ = 158414400.

The previous prime is 220241017. The next prime is 220241029. The reversal of 220241021 is 120142022.

220241021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 220241021 - 2² = 220241017 is a prime.

It is a super-2 number, since 2×220241021² = 97012214662244882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220240987 and 220241005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220241029) 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, 109010 + ... + 111011.

It is an arithmetic number, because the mean of its divisors is an integer number (18481848).

Almost surely, 2^220241021 is an apocalyptic number.

It is an amenable number.

220241021 is a deficient number, since it is larger than the sum of its proper divisors (75468547).

220241021 is a wasteful number, since it uses less digits than its factorization.

220241021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220052.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 220241021 is about 14840.5195663764. The cubic root of 220241021 is about 603.9014474893.

Adding to 220241021 its reverse (120142022), we get a palindrome (340383043).

The spelling of 220241021 in words is "two hundred twenty million, two hundred forty-one thousand, twenty-one".