220221110010021 has 4 divisors (see below), whose sum is σ = 293628146680032. Its totient is φ = 146814073340012.

The previous prime is 220221110010017. The next prime is 220221110010203. The reversal of 220221110010021 is 120010011122022.

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 220221110010021 - 2² = 220221110010017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221110010001) 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, 36703518335001 + ... + 36703518335006.

It is an arithmetic number, because the mean of its divisors is an integer number (73407036670008).

Almost surely, 2^{220221110010021} is an apocalyptic number.

It is an amenable number.

220221110010021 is a deficient number, since it is larger than the sum of its proper divisors (73407036670011).

220221110010021 is an equidigital number, since it uses as much as digits as its factorization.

220221110010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73407036670010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 220221110010021 its reverse (120010011122022), we get a palindrome (340231121132043).

The spelling of 220221110010021 in words is "two hundred twenty trillion, two hundred twenty-one billion, one hundred ten million, ten thousand, twenty-one".