12021708945 has 8 divisors (see below), whose sum is σ = 19234734336. Its totient is φ = 6411578096.

The previous prime is 12021708943. The next prime is 12021708947. The reversal of 12021708945 is 54980712021.

It is an interprime number because it is at equal distance from previous prime (12021708943) and next prime (12021708947).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12021708945 - 2¹ = 12021708943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021708943) 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, 400723617 + ... + 400723646.

It is an arithmetic number, because the mean of its divisors is an integer number (2404341792).

Almost surely, 2^12021708945 is an apocalyptic number.

12021708945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12021708945 is a deficient number, since it is larger than the sum of its proper divisors (7213025391).

12021708945 is an equidigital number, since it uses as much as digits as its factorization.

12021708945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801447271.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 12021708945 in words is "twelve billion, twenty-one million, seven hundred eight thousand, nine hundred forty-five".