220021120112221 has 4 divisors (see below), whose sum is σ = 227118575599744. Its totient is φ = 212923664624700.

The previous prime is 220021120112203. The next prime is 220021120112243. The reversal of 220021120112221 is 122211021120022.

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 220021120112221 - 2³¹ = 220018972628573 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 (220021120112291) 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 3 ways as a sum of consecutive naturals, for example, 3548727743715 + ... + 3548727743776.

It is an arithmetic number, because the mean of its divisors is an integer number (56779643899936).

Almost surely, 2^{220021120112221} is an apocalyptic number.

It is an amenable number.

220021120112221 is a deficient number, since it is larger than the sum of its proper divisors (7097455487523).

220021120112221 is an equidigital number, since it uses as much as digits as its factorization.

220021120112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7097455487522.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220021120112221 its reverse (122211021120022), we get a palindrome (342232141232243).

The spelling of 220021120112221 in words is "two hundred twenty trillion, twenty-one billion, one hundred twenty million, one hundred twelve thousand, two hundred twenty-one".