220221021110021 has 8 divisors (see below), whose sum is σ = 221174510799000. Its totient is φ = 219267859599360.

The previous prime is 220221021110017. The next prime is 220221021110053. The reversal of 220221021110021 is 120011120122022.

It can be written as a sum of positive squares in 4 ways, for example, as 90035522577025 + 130185498532996 = 9488705^2 + 11409886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220221021110021 - 2² = 220221021110017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221021110071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80699546 + ... + 83383803.

It is an arithmetic number, because the mean of its divisors is an integer number (27646813849875).

Almost surely, 2^{220221021110021} is an apocalyptic number.

It is an amenable number.

220221021110021 is a deficient number, since it is larger than the sum of its proper divisors (953489688979).

220221021110021 is a wasteful number, since it uses less digits than its factorization.

220221021110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164089159.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220221021110021 its reverse (120011120122022), we get a palindrome (340232141232043).

The spelling of 220221021110021 in words is "two hundred twenty trillion, two hundred twenty-one billion, twenty-one million, one hundred ten thousand, twenty-one".