220223223421 has 8 divisors (see below), whose sum is σ = 221094125784. Its totient is φ = 219353133120.

The previous prime is 220223223361. The next prime is 220223223433. The reversal of 220223223421 is 124322322022.

It can be written as a sum of positive squares in 4 ways, for example, as 9803772196 + 210419451225 = 99014^2 + 458715^2 .

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 220223223421 - 2⁷ = 220223223293 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 (220223223821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343335 + ... + 747211.

It is an arithmetic number, because the mean of its divisors is an integer number (27636765723).

Almost surely, 2^220223223421 is an apocalyptic number.

It is an amenable number.

220223223421 is a deficient number, since it is larger than the sum of its proper divisors (870902363).

220223223421 is a wasteful number, since it uses less digits than its factorization.

220223223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406031.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 220223223421 its reverse (124322322022), we get a palindrome (344545545443).

The spelling of 220223223421 in words is "two hundred twenty billion, two hundred twenty-three million, two hundred twenty-three thousand, four hundred twenty-one".