211131430427 has 2 divisors, whose sum is σ = 211131430428. Its totient is φ = 211131430426.

The previous prime is 211131430409. The next prime is 211131430493. The reversal of 211131430427 is 724034131112.

211131430427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211131430427 is a prime.

It is a super-2 number, since 2×211131430427² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211131430427.

It is not a weakly prime, because it can be changed into another prime (211131400427) 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, 105565715213 + 105565715214.

It is an arithmetic number, because the mean of its divisors is an integer number (105565715214).

Almost surely, 2^211131430427 is an apocalyptic number.

211131430427 is a deficient number, since it is larger than the sum of its proper divisors (1).

211131430427 is an equidigital number, since it uses as much as digits as its factorization.

211131430427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 211131430427 its reverse (724034131112), we get a palindrome (935165561539).

The spelling of 211131430427 in words is "two hundred eleven billion, one hundred thirty-one million, four hundred thirty thousand, four hundred twenty-seven".