220439192021 has 4 divisors (see below), whose sum is σ = 228040543500. Its totient is φ = 212837840544.

The previous prime is 220439192009. The next prime is 220439192023. The reversal of 220439192021 is 120291934022.

220439192021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 170330369521 + 50108822500 = 412711^2 + 223850^2 .

It is a cyclic number.

It is not a de Polignac number, because 220439192021 - 2¹⁰ = 220439190997 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 (220439192023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3800675696 + ... + 3800675753.

It is an arithmetic number, because the mean of its divisors is an integer number (57010135875).

Almost surely, 2^220439192021 is an apocalyptic number.

It is an amenable number.

220439192021 is a deficient number, since it is larger than the sum of its proper divisors (7601351479).

220439192021 is an equidigital number, since it uses as much as digits as its factorization.

220439192021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7601351478.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 220439192021 in words is "two hundred twenty billion, four hundred thirty-nine million, one hundred ninety-two thousand, twenty-one".