211423131247 has 2 divisors, whose sum is σ = 211423131248. Its totient is φ = 211423131246.

The previous prime is 211423131223. The next prime is 211423131253. The reversal of 211423131247 is 742131324112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211423131247 - 2²³ = 211414742639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211423131347) 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, 105711565623 + 105711565624.

It is an arithmetic number, because the mean of its divisors is an integer number (105711565624).

Almost surely, 2^211423131247 is an apocalyptic number.

211423131247 is a deficient number, since it is larger than the sum of its proper divisors (1).

211423131247 is an equidigital number, since it uses as much as digits as its factorization.

211423131247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

Adding to 211423131247 its reverse (742131324112), we get a palindrome (953554455359).

The spelling of 211423131247 in words is "two hundred eleven billion, four hundred twenty-three million, one hundred thirty-one thousand, two hundred forty-seven".