321220130121 has 12 divisors (see below), whose sum is σ = 506165053680. Its totient is φ = 194678866680.

The previous prime is 321220130117. The next prime is 321220130123. The reversal of 321220130121 is 121031022123.

321220130121 is a `hidden beast` number, since 321 + 2 + 20 + 1 + 301 + 21 = 666.

It is not a de Polignac number, because 321220130121 - 2² = 321220130117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321220130094 and 321220130103.

It is not an unprimeable number, because it can be changed into a prime (321220130123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1622323791 + ... + 1622323988.

It is an arithmetic number, because the mean of its divisors is an integer number (42180421140).

Almost surely, 2^321220130121 is an apocalyptic number.

It is an amenable number.

321220130121 is a deficient number, since it is larger than the sum of its proper divisors (184944923559).

321220130121 is a wasteful number, since it uses less digits than its factorization.

321220130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244647796 (or 3244647793 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 321220130121 its reverse (121031022123), we get a palindrome (442251152244).

The spelling of 321220130121 in words is "three hundred twenty-one billion, two hundred twenty million, one hundred thirty thousand, one hundred twenty-one".