220000124021 has 4 divisors (see below), whose sum is σ = 220022304672. Its totient is φ = 219977943372.

The previous prime is 220000123991. The next prime is 220000124083. The reversal of 220000124021 is 120421000022.

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.

It is a cyclic number.

It is not a de Polignac number, because 220000124021 - 2¹⁸ = 219999861877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220000123987 and 220000124005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220000124521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11075441 + ... + 11095286.

It is an arithmetic number, because the mean of its divisors is an integer number (55005576168).

Almost surely, 2^220000124021 is an apocalyptic number.

It is an amenable number.

220000124021 is a deficient number, since it is larger than the sum of its proper divisors (22180651).

220000124021 is an equidigital number, since it uses as much as digits as its factorization.

220000124021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22180650.

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

Adding to 220000124021 its reverse (120421000022), we get a palindrome (340421124043).

The spelling of 220000124021 in words is "two hundred twenty billion, one hundred twenty-four thousand, twenty-one".