220344010421 has 4 divisors (see below), whose sum is σ = 220346756844. Its totient is φ = 220341264000.

The previous prime is 220344010357. The next prime is 220344010423. The reversal of 220344010421 is 124010443022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124010443022 = 2 ⋅62005221511.

It can be written as a sum of positive squares in 2 ways, for example, as 81279159025 + 139064851396 = 285095^2 + 372914^2 .

It is a cyclic number.

It is not a de Polignac number, because 220344010421 - 2⁶ = 220344010357 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 (220344010423) 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, 1249130 + ... + 1414571.

It is an arithmetic number, because the mean of its divisors is an integer number (55086689211).

Almost surely, 2^220344010421 is an apocalyptic number.

It is an amenable number.

220344010421 is a deficient number, since it is larger than the sum of its proper divisors (2746423).

220344010421 is an equidigital number, since it uses as much as digits as its factorization.

220344010421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746422.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 220344010421 its reverse (124010443022), we get a palindrome (344354453443).

The spelling of 220344010421 in words is "two hundred twenty billion, three hundred forty-four million, ten thousand, four hundred twenty-one".