211130310021 has 4 divisors (see below), whose sum is σ = 281507080032. Its totient is φ = 140753540012.

The previous prime is 211130310011. The next prime is 211130310047. The reversal of 211130310021 is 120013031112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211130310021 - 2³⁷ = 73691356549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211130310011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35188385001 + ... + 35188385006.

It is an arithmetic number, because the mean of its divisors is an integer number (70376770008).

Almost surely, 2^211130310021 is an apocalyptic number.

It is an amenable number.

211130310021 is a deficient number, since it is larger than the sum of its proper divisors (70376770011).

211130310021 is an equidigital number, since it uses as much as digits as its factorization.

211130310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70376770010.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 211130310021 its reverse (120013031112), we get a palindrome (331143341133).

The spelling of 211130310021 in words is "two hundred eleven billion, one hundred thirty million, three hundred ten thousand, twenty-one".