12120212123 has 16 divisors (see below), whose sum is σ = 12357619200. Its totient is φ = 11884891200.

The previous prime is 12120212113. The next prime is 12120212173. The reversal of 12120212123 is 32121202121.

It is a cyclic number.

It is not a de Polignac number, because 12120212123 - 2¹⁴ = 12120195739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120212113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20233778 + ... + 20234376.

It is an arithmetic number, because the mean of its divisors is an integer number (772351200).

Almost surely, 2^12120212123 is an apocalyptic number.

12120212123 is a deficient number, since it is larger than the sum of its proper divisors (237407077).

12120212123 is an equidigital number, since it uses as much as digits as its factorization.

12120212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738.

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

Adding to 12120212123 its reverse (32121202121), we get a palindrome (44241414244).

The spelling of 12120212123 in words is "twelve billion, one hundred twenty million, two hundred twelve thousand, one hundred twenty-three".