212424320137 has 2 divisors, whose sum is σ = 212424320138. Its totient is φ = 212424320136.

The previous prime is 212424320047. The next prime is 212424320149. The reversal of 212424320137 is 731023424212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109521945481 + 102902374656 = 330941^2 + 320784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212424320137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212424320099 and 212424320108.

It is not a weakly prime, because it can be changed into another prime (212424326137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106212160068 + 106212160069.

It is an arithmetic number, because the mean of its divisors is an integer number (106212160069).

Almost surely, 2^212424320137 is an apocalyptic number.

It is an amenable number.

212424320137 is a deficient number, since it is larger than the sum of its proper divisors (1).

212424320137 is an equidigital number, since it uses as much as digits as its factorization.

212424320137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

Adding to 212424320137 its reverse (731023424212), we get a palindrome (943447744349).

The spelling of 212424320137 in words is "two hundred twelve billion, four hundred twenty-four million, three hundred twenty thousand, one hundred thirty-seven".