211231123443 has 12 divisors (see below), whose sum is σ = 307963134648. Its totient is φ = 139504666560.

The previous prime is 211231123391. The next prime is 211231123459. The reversal of 211231123443 is 344321132112.

211231123443 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 311 + 2 + 344 + 3 = 666.

It is not a de Polignac number, because 211231123443 - 2¹⁰ = 211231122419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211231123643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109672518 + ... + 109674443.

It is an arithmetic number, because the mean of its divisors is an integer number (25663594554).

Almost surely, 2^211231123443 is an apocalyptic number.

211231123443 is a deficient number, since it is larger than the sum of its proper divisors (96732011205).

211231123443 is a wasteful number, since it uses less digits than its factorization.

211231123443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219347074 (or 219347071 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 211231123443 its reverse (344321132112), we get a palindrome (555552255555).

The spelling of 211231123443 in words is "two hundred eleven billion, two hundred thirty-one million, one hundred twenty-three thousand, four hundred forty-three".