220221001321 has 4 divisors (see below), whose sum is σ = 220222746000. Its totient is φ = 220219256644.

The previous prime is 220221001303. The next prime is 220221001373. The reversal of 220221001321 is 123100122022.

It is a happy number.

220221001321 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, 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 220221001321 - 2⁹ = 220221000809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220221001295 and 220221001304.

It is not an unprimeable number, because it can be changed into a prime (220221001621) 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, 666871 + ... + 940828.

It is an arithmetic number, because the mean of its divisors is an integer number (55055686500).

Almost surely, 2^220221001321 is an apocalyptic number.

It is an amenable number.

220221001321 is a deficient number, since it is larger than the sum of its proper divisors (1744679).

220221001321 is a wasteful number, since it uses less digits than its factorization.

220221001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744678.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 220221001321 its reverse (123100122022), we get a palindrome (343321123343).

The spelling of 220221001321 in words is "two hundred twenty billion, two hundred twenty-one million, one thousand, three hundred twenty-one".