212134123 has 4 divisors (see below), whose sum is σ = 217308168. Its totient is φ = 206960080.

The previous prime is 212134121. The next prime is 212134133. The reversal of 212134123 is 321431212.

It is a happy number.

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 212134123 - 2¹ = 212134121 is a prime.

It is a super-2 number, since 2×212134123² = 90001772281958258, which contains 22 as substring.

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 212134123.

It is not an unprimeable number, because it can be changed into a prime (212134121) 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, 2586961 + ... + 2587042.

It is an arithmetic number, because the mean of its divisors is an integer number (54327042).

Almost surely, 2^212134123 is an apocalyptic number.

212134123 is a deficient number, since it is larger than the sum of its proper divisors (5174045).

212134123 is an equidigital number, since it uses as much as digits as its factorization.

212134123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174044.

The product of its digits is 288, while the sum is 19.

The square root of 212134123 is about 14564.8248530492. The cubic root of 212134123 is about 596.3989144700.

Adding to 212134123 its reverse (321431212), we get a palindrome (533565335).

The spelling of 212134123 in words is "two hundred twelve million, one hundred thirty-four thousand, one hundred twenty-three".