13212201118021 has 2 divisors, whose sum is σ = 13212201118022. Its totient is φ = 13212201118020.

The previous prime is 13212201118019. The next prime is 13212201118043. The reversal of 13212201118021 is 12081110221231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12394722936996 + 817478181025 = 3520614^2 + 904145^2 .

It is a cyclic number.

It is not a de Polignac number, because 13212201118021 - 2¹ = 13212201118019 is a prime.

Together with 13212201118019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13212201118091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6606100559010 + 6606100559011.

It is an arithmetic number, because the mean of its divisors is an integer number (6606100559011).

Almost surely, 2^{13212201118021} is an apocalyptic number.

It is an amenable number.

13212201118021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13212201118021 is an equidigital number, since it uses as much as digits as its factorization.

13212201118021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 25.

Adding to 13212201118021 its reverse (12081110221231), we get a palindrome (25293311339252).

The spelling of 13212201118021 in words is "thirteen trillion, two hundred twelve billion, two hundred one million, one hundred eighteen thousand, twenty-one".