12128921310 has 64 divisors (see below), whose sum is σ = 31793264640. Its totient is φ = 2936868480.

The previous prime is 12128921297. The next prime is 12128921333. The reversal of 12128921310 is 1312982121.

It is a super-2 number, since 2×12128921310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263496 + ... + 306084.

It is an arithmetic number, because the mean of its divisors is an integer number (496769760).

Almost surely, 2^12128921310 is an apocalyptic number.

12128921310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12128921310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15896632320).

12128921310 is an abundant number, since it is smaller than the sum of its proper divisors (19664343330).

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

12128921310 is a wasteful number, since it uses less digits than its factorization.

12128921310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43473.

The product of its (nonzero) digits is 1728, while the sum is 30.

The spelling of 12128921310 in words is "twelve billion, one hundred twenty-eight million, nine hundred twenty-one thousand, three hundred ten".