211432242137 has 2 divisors, whose sum is σ = 211432242138. Its totient is φ = 211432242136.

The previous prime is 211432242097. The next prime is 211432242139. The reversal of 211432242137 is 731242234112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203307202816 + 8125039321 = 450896^2 + 90139^2 .

It is a cyclic number.

It is not a de Polignac number, because 211432242137 - 2²² = 211428047833 is a prime.

Together with 211432242139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211432242139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105716121068 + 105716121069.

It is an arithmetic number, because the mean of its divisors is an integer number (105716121069).

Almost surely, 2^211432242137 is an apocalyptic number.

It is an amenable number.

211432242137 is a deficient number, since it is larger than the sum of its proper divisors (1).

211432242137 is an equidigital number, since it uses as much as digits as its factorization.

211432242137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 32.

Adding to 211432242137 its reverse (731242234112), we get a palindrome (942674476249).

The spelling of 211432242137 in words is "two hundred eleven billion, four hundred thirty-two million, two hundred forty-two thousand, one hundred thirty-seven".