211021220112013 has 2 divisors, whose sum is σ = 211021220112014. Its totient is φ = 211021220112012.

The previous prime is 211021220112007. The next prime is 211021220112029. The reversal of 211021220112013 is 310211022120112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115108930427689 + 95912289684324 = 10728883^2 + 9793482^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021220112013 - 2⁴¹ = 208822196856461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211021220152013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510610056006 + 105510610056007.

It is an arithmetic number, because the mean of its divisors is an integer number (105510610056007).

Almost surely, 2^{211021220112013} is an apocalyptic number.

It is an amenable number.

211021220112013 is a deficient number, since it is larger than the sum of its proper divisors (1).

211021220112013 is an equidigital number, since it uses as much as digits as its factorization.

211021220112013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 211021220112013 its reverse (310211022120112), we get a palindrome (521232242232125).

The spelling of 211021220112013 in words is "two hundred eleven trillion, twenty-one billion, two hundred twenty million, one hundred twelve thousand, thirteen".