211312244231 has 16 divisors (see below), whose sum is σ = 236591953920. Its totient is φ = 187108553280.

The previous prime is 211312244179. The next prime is 211312244233. The reversal of 211312244231 is 132442213112.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-211312244231 is a prime.

It is a super-2 number, since 2×211312244231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211312244231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211312244233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1545191 + ... + 1676376.

It is an arithmetic number, because the mean of its divisors is an integer number (14786997120).

Almost surely, 2^211312244231 is an apocalyptic number.

211312244231 is a deficient number, since it is larger than the sum of its proper divisors (25279709689).

211312244231 is a wasteful number, since it uses less digits than its factorization.

211312244231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221734.

The product of its digits is 2304, while the sum is 26.

Adding to 211312244231 its reverse (132442213112), we get a palindrome (343754457343).

The spelling of 211312244231 in words is "two hundred eleven billion, three hundred twelve million, two hundred forty-four thousand, two hundred thirty-one".