211043002031 has 4 divisors (see below), whose sum is σ = 220218784752. Its totient is φ = 201867219312.

The previous prime is 211043002021. The next prime is 211043002043. The reversal of 211043002031 is 130200340112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211043002031 is a prime.

It is a super-2 number, since 2×211043002031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211043002021) 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, 4587891326 + ... + 4587891371.

It is an arithmetic number, because the mean of its divisors is an integer number (55054696188).

Almost surely, 2^211043002031 is an apocalyptic number.

211043002031 is a deficient number, since it is larger than the sum of its proper divisors (9175782721).

211043002031 is an equidigital number, since it uses as much as digits as its factorization.

211043002031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9175782720.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 211043002031 its reverse (130200340112), we get a palindrome (341243342143).

The spelling of 211043002031 in words is "two hundred eleven billion, forty-three million, two thousand, thirty-one".