212423111 has 4 divisors (see below), whose sum is σ = 212492952. Its totient is φ = 212353272.

The previous prime is 212423089. The next prime is 212423117. The reversal of 212423111 is 111324212.

212423111 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 212423111 - 2⁶ = 212423047 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 212423111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212423117) 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, 30140 + ... + 36513.

It is an arithmetic number, because the mean of its divisors is an integer number (53123238).

Almost surely, 2^212423111 is an apocalyptic number.

212423111 is a deficient number, since it is larger than the sum of its proper divisors (69841).

212423111 is an equidigital number, since it uses as much as digits as its factorization.

212423111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69840.

The product of its digits is 96, while the sum is 17.

The square root of 212423111 is about 14574.7422275662. The cubic root of 212423111 is about 596.6696141603.

Adding to 212423111 its reverse (111324212), we get a palindrome (323747323).

The spelling of 212423111 in words is "two hundred twelve million, four hundred twenty-three thousand, one hundred eleven".