220101021120221 has 4 divisors (see below), whose sum is σ = 220411459796700. Its totient is φ = 219790582443744.

The previous prime is 220101021120203. The next prime is 220101021120223. The reversal of 220101021120221 is 122021120101022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52662234765625 + 167438786354596 = 7256875^2 + 12939814^2 .

It is a cyclic number.

It is not a de Polignac number, because 220101021120221 - 2¹⁰ = 220101021119197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220101021120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220101021120223) 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, 155219337176 + ... + 155219338593.

It is an arithmetic number, because the mean of its divisors is an integer number (55102864949175).

Almost surely, 2^{220101021120221} is an apocalyptic number.

It is an amenable number.

220101021120221 is a deficient number, since it is larger than the sum of its proper divisors (310438676479).

220101021120221 is an equidigital number, since it uses as much as digits as its factorization.

220101021120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310438676478.

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

Adding to 220101021120221 its reverse (122021120101022), we get a palindrome (342122141221243).

The spelling of 220101021120221 in words is "two hundred twenty trillion, one hundred one billion, twenty-one million, one hundred twenty thousand, two hundred twenty-one".