12021710320 has 40 divisors (see below), whose sum is σ = 27978365520. Its totient is φ = 4803886080.

The previous prime is 12021710303. The next prime is 12021710329. The reversal of 12021710320 is 2301712021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021710329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6255 + ... + 155185.

It is an arithmetic number, because the mean of its divisors is an integer number (699459138).

Almost surely, 2^12021710320 is an apocalyptic number.

12021710320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021710320 is an abundant number, since it is smaller than the sum of its proper divisors (15956655200).

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

12021710320 is a wasteful number, since it uses less digits than its factorization.

12021710320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149953 (or 149947 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The spelling of 12021710320 in words is "twelve billion, twenty-one million, seven hundred ten thousand, three hundred twenty".