211131321043 has 4 divisors (see below), whose sum is σ = 215114930928. Its totient is φ = 207147711160.

The previous prime is 211131320999. The next prime is 211131321059. The reversal of 211131321043 is 340123131112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211131321043 - 2³⁷ = 73692367571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211131351043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1991804863 + ... + 1991804968.

It is an arithmetic number, because the mean of its divisors is an integer number (53778732732).

Almost surely, 2^211131321043 is an apocalyptic number.

211131321043 is a deficient number, since it is larger than the sum of its proper divisors (3983609885).

211131321043 is an equidigital number, since it uses as much as digits as its factorization.

211131321043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983609884.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 211131321043 its reverse (340123131112), we get a palindrome (551254452155).

The spelling of 211131321043 in words is "two hundred eleven billion, one hundred thirty-one million, three hundred twenty-one thousand, forty-three".