305021120000000 has 208 divisors, whose sum is σ = 762458562944832. Its totient is φ = 122008320000000.

The previous prime is 305021119999969. The next prime is 305021120000021. The reversal of 305021120000000 is 21120503.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 305021120000000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319523405 + ... + 320476595.

It is an arithmetic number, because the mean of its divisors is an integer number (3665666168004).

Almost surely, 2^{305021120000000} 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 305021120000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381229281472416).

305021120000000 is an abundant number, since it is smaller than the sum of its proper divisors (457437442944832).

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

305021120000000 is an frugal number, since it uses more digits than its factorization.

305021120000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953250 (or 953198 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

Adding to 305021120000000 its reverse (21120503), we get a palindrome (305021141120503).

The spelling of 305021120000000 in words is "three hundred five trillion, twenty-one billion, one hundred twenty million", and thus it is an aban number.