212102311 has 4 divisors (see below), whose sum is σ = 212784624. Its totient is φ = 211420000.

The previous prime is 212102299. The next prime is 212102321. The reversal of 212102311 is 113201212.

212102311 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 not a de Polignac number, because 212102311 - 2¹¹ = 212100263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212102291 and 212102300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102321) 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, 340690 + ... + 341311.

It is an arithmetic number, because the mean of its divisors is an integer number (53196156).

Almost surely, 2^212102311 is an apocalyptic number.

212102311 is a deficient number, since it is larger than the sum of its proper divisors (682313).

212102311 is an equidigital number, since it uses as much as digits as its factorization.

212102311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682312.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 212102311 is about 14563.7327289401. The cubic root of 212102311 is about 596.3691006421.

Adding to 212102311 its reverse (113201212), we get a palindrome (325303523).

The spelling of 212102311 in words is "two hundred twelve million, one hundred two thousand, three hundred eleven".