220033330021 has 4 divisors (see below), whose sum is σ = 221490504544. Its totient is φ = 218576155500.

The previous prime is 220033330019. The next prime is 220033330073. The reversal of 220033330021 is 120033330022.

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.

It is a cyclic number.

It is not a de Polignac number, because 220033330021 - 2¹ = 220033330019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220033330081) 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, 728587035 + ... + 728587336.

It is an arithmetic number, because the mean of its divisors is an integer number (55372626136).

Almost surely, 2^220033330021 is an apocalyptic number.

It is an amenable number.

220033330021 is a deficient number, since it is larger than the sum of its proper divisors (1457174523).

220033330021 is a wasteful number, since it uses less digits than its factorization.

220033330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457174522.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 220033330021 its reverse (120033330022), we get a palindrome (340066660043).

Subtracting from 220033330021 its reverse (120033330022), we obtain a palindrome (99999999999).

The spelling of 220033330021 in words is "two hundred twenty billion, thirty-three million, three hundred thirty thousand, twenty-one".