212030122123 has 4 divisors (see below), whose sum is σ = 212350894528. Its totient is φ = 211709349720.

The previous prime is 212030122111. The next prime is 212030122127. The reversal of 212030122123 is 321221030212.

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-212030122123 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 212030122123.

It is not an unprimeable number, because it can be changed into a prime (212030122127) 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, 160385211 + ... + 160386532.

It is an arithmetic number, because the mean of its divisors is an integer number (53087723632).

Almost surely, 2^212030122123 is an apocalyptic number.

212030122123 is a deficient number, since it is larger than the sum of its proper divisors (320772405).

212030122123 is an equidigital number, since it uses as much as digits as its factorization.

212030122123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320772404.

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

Adding to 212030122123 its reverse (321221030212), we get a palindrome (533251152335).

It can be divided in two parts, 212030 and 122123, that added together give a triangular number (334153 = T₈₁₇).

The spelling of 212030122123 in words is "two hundred twelve billion, thirty million, one hundred twenty-two thousand, one hundred twenty-three".