320211121221 has 6 divisors (see below), whose sum is σ = 462527175110. Its totient is φ = 213474080808.

The previous prime is 320211121187. The next prime is 320211121291. The reversal of 320211121221 is 122121112023.

320211121221 is a `hidden beast` number, since 320 + 2 + 1 + 1 + 121 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 203749320996 + 116461800225 = 451386^2 + 341265^2 .

It is not a de Polignac number, because 320211121221 - 2¹⁸ = 320210859077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320211121194 and 320211121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320211121291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17789506726 + ... + 17789506743.

Almost surely, 2^320211121221 is an apocalyptic number.

It is an amenable number.

320211121221 is a deficient number, since it is larger than the sum of its proper divisors (142316053889).

320211121221 is a wasteful number, since it uses less digits than its factorization.

320211121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35579013475 (or 35579013472 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 320211121221 its reverse (122121112023), we get a palindrome (442332233244).

The spelling of 320211121221 in words is "three hundred twenty billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".