12021021111013 has 2 divisors, whose sum is σ = 12021021111014. Its totient is φ = 12021021111012.

The previous prime is 12021021110993. The next prime is 12021021111053. The reversal of 12021021111013 is 31011112012021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6549084937924 + 5471936173089 = 2559118^2 + 2339217^2 .

It is an emirp because it is prime and its reverse (31011112012021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12021021111013 - 2³⁷ = 11883582157541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021021111053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010510555506 + 6010510555507.

It is an arithmetic number, because the mean of its divisors is an integer number (6010510555507).

Almost surely, 2^{12021021111013} is an apocalyptic number.

It is an amenable number.

12021021111013 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021021111013 is an equidigital number, since it uses as much as digits as its factorization.

12021021111013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 12021021111013 its reverse (31011112012021), we get a palindrome (43032133123034).

The spelling of 12021021111013 in words is "twelve trillion, twenty-one billion, twenty-one million, one hundred eleven thousand, thirteen".