212021031311 has 4 divisors (see below), whose sum is σ = 212181776400. Its totient is φ = 211860286224.

The previous prime is 212021031241. The next prime is 212021031359. The reversal of 212021031311 is 113130120212.

212021031311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-212021031311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212021031311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021031371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80370566 + ... + 80373203.

It is an arithmetic number, because the mean of its divisors is an integer number (53045444100).

Almost surely, 2^212021031311 is an apocalyptic number.

212021031311 is a deficient number, since it is larger than the sum of its proper divisors (160745089).

212021031311 is a wasteful number, since it uses less digits than its factorization.

212021031311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160745088.

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

Adding to 212021031311 its reverse (113130120212), we get a palindrome (325151151523).

The spelling of 212021031311 in words is "two hundred twelve billion, twenty-one million, thirty-one thousand, three hundred eleven".