306621432232120 has 128 divisors (see below), whose sum is σ = 735212623464000. Its totient is φ = 114759561646080.

The previous prime is 306621432232021. The next prime is 306621432232123. The reversal of 306621432232120 is 21232234126603.

It is a self number, because there is not a number n which added to its sum of digits gives 306621432232120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306621432232123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20016190 + ... + 31841650.

Almost surely, 2^{306621432232120} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 306621432232120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367606311732000).

306621432232120 is an abundant number, since it is smaller than the sum of its proper divisors (428591191231880).

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

306621432232120 is a wasteful number, since it uses less digits than its factorization.

306621432232120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11825913 (or 11825909 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 306621432232120 its reverse (21232234126603), we get a palindrome (327853666358723).

The spelling of 306621432232120 in words is "three hundred six trillion, six hundred twenty-one billion, four hundred thirty-two million, two hundred thirty-two thousand, one hundred twenty".