211031210213 has 4 divisors (see below), whose sum is σ = 211107979500. Its totient is φ = 210954440928.

The previous prime is 211031210141. The next prime is 211031210267. The reversal of 211031210213 is 312012130112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 88743218404 + 122287991809 = 297898^2 + 349697^2 .

It is a cyclic number.

It is not a de Polignac number, because 211031210213 - 2⁸ = 211031209957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211031210191 and 211031210200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211031210513) 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, 38380520 + ... + 38386017.

It is an arithmetic number, because the mean of its divisors is an integer number (52776994875).

Almost surely, 2^211031210213 is an apocalyptic number.

It is an amenable number.

211031210213 is a deficient number, since it is larger than the sum of its proper divisors (76769287).

211031210213 is an equidigital number, since it uses as much as digits as its factorization.

211031210213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76769286.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 211031210213 its reverse (312012130112), we get a palindrome (523043340325).

The spelling of 211031210213 in words is "two hundred eleven billion, thirty-one million, two hundred ten thousand, two hundred thirteen".