1212112012123 has 2 divisors, whose sum is σ = 1212112012124. Its totient is φ = 1212112012122.

The previous prime is 1212112012093. The next prime is 1212112012169. The reversal of 1212112012123 is 3212102112121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212112012123 - 2⁵ = 1212112012091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212112012123.

It is not a weakly prime, because it can be changed into another prime (1212112042123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606056006061 + 606056006062.

It is an arithmetic number, because the mean of its divisors is an integer number (606056006062).

Almost surely, 2^{1212112012123} is an apocalyptic number.

1212112012123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212112012123 is an equidigital number, since it uses as much as digits as its factorization.

1212112012123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1212112012123 its reverse (3212102112121), we get a palindrome (4424214124244).

The spelling of 1212112012123 in words is "one trillion, two hundred twelve billion, one hundred twelve million, twelve thousand, one hundred twenty-three".