212123020120123 has 16 divisors (see below), whose sum is σ = 242629329885696. Its totient is φ = 181667471544000.

The previous prime is 212123020120111. The next prime is 212123020120169. The reversal of 212123020120123 is 321021020321212.

It is a cyclic number.

It is not a de Polignac number, because 212123020120123 - 2⁹ = 212123020119611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212123020120094 and 212123020120103.

It is not an unprimeable number, because it can be changed into a prime (212123020120103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 489909415 + ... + 490342207.

It is an arithmetic number, because the mean of its divisors is an integer number (15164333117856).

Almost surely, 2^{212123020120123} is an apocalyptic number.

212123020120123 is a deficient number, since it is larger than the sum of its proper divisors (30506309765573).

212123020120123 is a wasteful number, since it uses less digits than its factorization.

212123020120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491274.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 212123020120123 its reverse (321021020321212), we get a palindrome (533144040441335).

The spelling of 212123020120123 in words is "two hundred twelve trillion, one hundred twenty-three billion, twenty million, one hundred twenty thousand, one hundred twenty-three".