211896128231 has 2 divisors, whose sum is σ = 211896128232. Its totient is φ = 211896128230.

The previous prime is 211896128207. The next prime is 211896128309. The reversal of 211896128231 is 132821698112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211896128231 is a prime.

It is a super-2 number, since 2×211896128231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211896128201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105948064115 + 105948064116.

It is an arithmetic number, because the mean of its divisors is an integer number (105948064116).

Almost surely, 2^211896128231 is an apocalyptic number.

211896128231 is a deficient number, since it is larger than the sum of its proper divisors (1).

211896128231 is an equidigital number, since it uses as much as digits as its factorization.

211896128231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 44.

The spelling of 211896128231 in words is "two hundred eleven billion, eight hundred ninety-six million, one hundred twenty-eight thousand, two hundred thirty-one".