321002121 has 16 divisors (see below), whose sum is σ = 479533248. Its totient is φ = 189288000.

The previous prime is 321002083. The next prime is 321002153. The reversal of 321002121 is 121200123.

It is not a de Polignac number, because 321002121 - 2¹⁰ = 321001097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321002097 and 321002106.

It is not an unprimeable number, because it can be changed into a prime (321002921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130230 + ... + 132671.

It is an arithmetic number, because the mean of its divisors is an integer number (29970828).

Almost surely, 2^321002121 is an apocalyptic number.

It is an amenable number.

321002121 is a deficient number, since it is larger than the sum of its proper divisors (158531127).

321002121 is a wasteful number, since it uses less digits than its factorization.

321002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262952.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 321002121 is about 17916.5320584091. The cubic root of 321002121 is about 684.7036358050.

Adding to 321002121 its reverse (121200123), we get a palindrome (442202244).

It can be divided in two parts, 321002 and 121, that added together give a palindrome (321123).

The spelling of 321002121 in words is "three hundred twenty-one million, two thousand, one hundred twenty-one".