321030621306 has 12 divisors (see below), whose sum is σ = 695566346202. Its totient is φ = 107010207096.

The previous prime is 321030621259. The next prime is 321030621341. The reversal of 321030621306 is 603126030123.

It is a happy number.

321030621306 is a `hidden beast` number, since 3 + 2 + 1 + 0 + 3 + 0 + 621 + 30 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 175903909281 + 145126712025 = 419409^2 + 380955^2 .

It is a super-2 number, since 2×321030621306² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321030621306.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8917517241 + ... + 8917517276.

Almost surely, 2^321030621306 is an apocalyptic number.

321030621306 is an abundant number, since it is smaller than the sum of its proper divisors (374535724896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321030621306 is a wasteful number, since it uses less digits than its factorization.

321030621306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17835034525 (or 17835034522 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 321030621306 its reverse (603126030123), we get a palindrome (924156651429).

The spelling of 321030621306 in words is "three hundred twenty-one billion, thirty million, six hundred twenty-one thousand, three hundred six".