212213243123137 has 2 divisors, whose sum is σ = 212213243123138. Its totient is φ = 212213243123136.

The previous prime is 212213243123113. The next prime is 212213243123143. The reversal of 212213243123137 is 731321342312212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118292509527696 + 93920733595441 = 10876236^2 + 9691271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212213243123137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212213243123096 and 212213243123105.

It is not a weakly prime, because it can be changed into another prime (212213243124137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106106621561568 + 106106621561569.

It is an arithmetic number, because the mean of its divisors is an integer number (106106621561569).

Almost surely, 2^{212213243123137} is an apocalyptic number.

It is an amenable number.

212213243123137 is a deficient number, since it is larger than the sum of its proper divisors (1).

212213243123137 is an equidigital number, since it uses as much as digits as its factorization.

212213243123137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 37.

Adding to 212213243123137 its reverse (731321342312212), we get a palindrome (943534585435349).

The spelling of 212213243123137 in words is "two hundred twelve trillion, two hundred thirteen billion, two hundred forty-three million, one hundred twenty-three thousand, one hundred thirty-seven".