212011312223 has 16 divisors (see below), whose sum is σ = 226346937600. Its totient is φ = 197996322240.

The previous prime is 212011312217. The next prime is 212011312273. The reversal of 212011312223 is 322213110212.

It is a cyclic number.

It is not a de Polignac number, because 212011312223 - 2²² = 212007117919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212011312195 and 212011312204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011312273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2638718 + ... + 2717876.

It is an arithmetic number, because the mean of its divisors is an integer number (14146683600).

Almost surely, 2^212011312223 is an apocalyptic number.

212011312223 is a deficient number, since it is larger than the sum of its proper divisors (14335625377).

212011312223 is a wasteful number, since it uses less digits than its factorization.

212011312223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81182.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212011312223 its reverse (322213110212), we get a palindrome (534224422435).

The spelling of 212011312223 in words is "two hundred twelve billion, eleven million, three hundred twelve thousand, two hundred twenty-three".