12021191002 has 8 divisors (see below), whose sum is σ = 18037595700. Its totient is φ = 6008659104.

The previous prime is 12021190991. The next prime is 12021191003. The reversal of 12021191002 is 20019112021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11083667841 + 937523161 = 105279^2 + 30619^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12021191003) 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, 960427 + ... + 972862.

Almost surely, 2^12021191002 is an apocalyptic number.

12021191002 is a deficient number, since it is larger than the sum of its proper divisors (6016404698).

12021191002 is a wasteful number, since it uses less digits than its factorization.

12021191002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936400.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 12021191002 in words is "twelve billion, twenty-one million, one hundred ninety-one thousand, two".