212212012123 has 4 divisors (see below), whose sum is σ = 212216392768. Its totient is φ = 212207631480.

The previous prime is 212212012099. The next prime is 212212012151. The reversal of 212212012123 is 321210212212.

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 212212012123 - 2¹³ = 212212003931 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 212212012123.

It is not an unprimeable number, because it can be changed into a prime (212212012153) 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, 2116836 + ... + 2214817.

It is an arithmetic number, because the mean of its divisors is an integer number (53054098192).

Almost surely, 2^212212012123 is an apocalyptic number.

212212012123 is a deficient number, since it is larger than the sum of its proper divisors (4380645).

212212012123 is an equidigital number, since it uses as much as digits as its factorization.

212212012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4380644.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212212012123 its reverse (321210212212), we get a palindrome (533422224335).

The spelling of 212212012123 in words is "two hundred twelve billion, two hundred twelve million, twelve thousand, one hundred twenty-three".