211323230031 has 4 divisors (see below), whose sum is σ = 281764306712. Its totient is φ = 140882153352.

The previous prime is 211323230017. The next prime is 211323230047. The reversal of 211323230031 is 130032323112.

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

It is not a de Polignac number, because 211323230031 - 2⁶ = 211323229967 is a prime.

It is a super-2 number, since 2×211323230031² (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 (211323230011) 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, 35220538336 + ... + 35220538341.

It is an arithmetic number, because the mean of its divisors is an integer number (70441076678).

Almost surely, 2^211323230031 is an apocalyptic number.

211323230031 is a deficient number, since it is larger than the sum of its proper divisors (70441076681).

211323230031 is an equidigital number, since it uses as much as digits as its factorization.

211323230031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70441076680.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 211323230031 its reverse (130032323112), we get a palindrome (341355553143).

The spelling of 211323230031 in words is "two hundred eleven billion, three hundred twenty-three million, two hundred thirty thousand, thirty-one".