220141021 has 4 divisors (see below), whose sum is σ = 220248000. Its totient is φ = 220034044.

The previous prime is 220141003. The next prime is 220141057. The reversal of 220141021 is 120141022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120141022 = 2 ⋅60070511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220141021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220140992 and 220141010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220141081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50341 + ... + 54538.

It is an arithmetic number, because the mean of its divisors is an integer number (55062000).

Almost surely, 2^220141021 is an apocalyptic number.

It is an amenable number.

220141021 is a deficient number, since it is larger than the sum of its proper divisors (106979).

220141021 is a wasteful number, since it uses less digits than its factorization.

220141021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106978.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 220141021 is about 14837.1500295710. The cubic root of 220141021 is about 603.8100335665.

Adding to 220141021 its reverse (120141022), we get a palindrome (340282043).

Subtracting from 220141021 its reverse (120141022), we obtain a palindrome (99999999).

The spelling of 220141021 in words is "two hundred twenty million, one hundred forty-one thousand, twenty-one".