12021013013 has 4 divisors (see below), whose sum is σ = 12021294348. Its totient is φ = 12020731680.

The previous prime is 12021013009. The next prime is 12021013019. The reversal of 12021013013 is 31031012021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8448918724 + 3572094289 = 91918^2 + 59767^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021013013 - 2² = 12021013009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021013019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61856 + ... + 166937.

It is an arithmetic number, because the mean of its divisors is an integer number (3005323587).

Almost surely, 2^12021013013 is an apocalyptic number.

It is an amenable number.

12021013013 is a deficient number, since it is larger than the sum of its proper divisors (281335).

12021013013 is an equidigital number, since it uses as much as digits as its factorization.

12021013013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281334.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 12021013013 its reverse (31031012021), we get a palindrome (43052025034).

The spelling of 12021013013 in words is "twelve billion, twenty-one million, thirteen thousand, thirteen".