321012003 has 16 divisors (see below), whose sum is σ = 488055456. Its totient is φ = 185925120.

The previous prime is 321011987. The next prime is 321012017. The reversal of 321012003 is 300210123.

It is a happy number.

It is not a de Polignac number, because 321012003 - 2⁴ = 321011987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321012003.

It is not an unprimeable number, because it can be changed into a prime (321014003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241428 + ... + 242753.

It is an arithmetic number, because the mean of its divisors is an integer number (30503466).

Almost surely, 2^321012003 is an apocalyptic number.

321012003 is a deficient number, since it is larger than the sum of its proper divisors (167043453).

321012003 is a wasteful number, since it uses less digits than its factorization.

321012003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484214.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 321012003 is about 17916.8078351028. The cubic root of 321012003 is about 684.7106618976.

Adding to 321012003 its reverse (300210123), we get a palindrome (621222126).

The spelling of 321012003 in words is "three hundred twenty-one million, twelve thousand, three".