2021212113313 has 2 divisors, whose sum is σ = 2021212113314. Its totient is φ = 2021212113312.

The previous prime is 2021212113229. The next prime is 2021212113331. The reversal of 2021212113313 is 3133112121202.

Together with next prime (2021212113331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2017357193569 + 3854919744 = 1420337^2 + 62088^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021212113313 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021212113413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010606056656 + 1010606056657.

It is an arithmetic number, because the mean of its divisors is an integer number (1010606056657).

Almost surely, 2^{2021212113313} is an apocalyptic number.

It is an amenable number.

2021212113313 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021212113313 is an equidigital number, since it uses as much as digits as its factorization.

2021212113313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2021212113313 its reverse (3133112121202), we get a palindrome (5154324234515).

The spelling of 2021212113313 in words is "two trillion, twenty-one billion, two hundred twelve million, one hundred thirteen thousand, three hundred thirteen".