211313072231 has 2 divisors, whose sum is σ = 211313072232. Its totient is φ = 211313072230.

The previous prime is 211313072209. The next prime is 211313072239. The reversal of 211313072231 is 132270313112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211313072231 is a prime.

It is a super-2 number, since 2×211313072231² (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 211313072231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211313072239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105656536115 + 105656536116.

It is an arithmetic number, because the mean of its divisors is an integer number (105656536116).

Almost surely, 2^211313072231 is an apocalyptic number.

211313072231 is a deficient number, since it is larger than the sum of its proper divisors (1).

211313072231 is an equidigital number, since it uses as much as digits as its factorization.

211313072231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 211313072231 its reverse (132270313112), we get a palindrome (343583385343).

The spelling of 211313072231 in words is "two hundred eleven billion, three hundred thirteen million, seventy-two thousand, two hundred thirty-one".