213111344137 has 2 divisors, whose sum is σ = 213111344138. Its totient is φ = 213111344136.

The previous prime is 213111344107. The next prime is 213111344143. The reversal of 213111344137 is 731443111312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107967445056 + 105143899081 = 328584^2 + 324259^2 .

It is a cyclic number.

It is not a de Polignac number, because 213111344137 - 2²⁷ = 212977126409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213111344099 and 213111344108.

It is not a weakly prime, because it can be changed into another prime (213111344107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106555672068 + 106555672069.

It is an arithmetic number, because the mean of its divisors is an integer number (106555672069).

Almost surely, 2^213111344137 is an apocalyptic number.

It is an amenable number.

213111344137 is a deficient number, since it is larger than the sum of its proper divisors (1).

213111344137 is an equidigital number, since it uses as much as digits as its factorization.

213111344137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

Adding to 213111344137 its reverse (731443111312), we get a palindrome (944554455449).

The spelling of 213111344137 in words is "two hundred thirteen billion, one hundred eleven million, three hundred forty-four thousand, one hundred thirty-seven".