12000021193 has 4 divisors (see below), whose sum is σ = 12169035648. Its totient is φ = 11831006740.

The previous prime is 12000021181. The next prime is 12000021233. The reversal of 12000021193 is 39112000021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39112000021 = 104021 ⋅376001.

It is a cyclic number.

It is not a de Polignac number, because 12000021193 - 2³³ = 3410086601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12000021193.

It is not an unprimeable number, because it can be changed into a prime (12000021113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84507121 + ... + 84507262.

It is an arithmetic number, because the mean of its divisors is an integer number (3042258912).

Almost surely, 2^12000021193 is an apocalyptic number.

It is an amenable number.

12000021193 is a deficient number, since it is larger than the sum of its proper divisors (169014455).

12000021193 is an equidigital number, since it uses as much as digits as its factorization.

12000021193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169014454.

The product of its (nonzero) digits is 108, while the sum is 19.

The spelling of 12000021193 in words is "twelve billion, twenty-one thousand, one hundred ninety-three".