1212120100123 has 2 divisors, whose sum is σ = 1212120100124. Its totient is φ = 1212120100122.

The previous prime is 1212120100057. The next prime is 1212120100127. The reversal of 1212120100123 is 3210010212121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212120100123 - 2⁹ = 1212120099611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212120100097 and 1212120100106.

It is not a weakly prime, because it can be changed into another prime (1212120100127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606060050061 + 606060050062.

It is an arithmetic number, because the mean of its divisors is an integer number (606060050062).

Almost surely, 2^{1212120100123} is an apocalyptic number.

1212120100123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212120100123 is an equidigital number, since it uses as much as digits as its factorization.

1212120100123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1212120100123 its reverse (3210010212121), we get a palindrome (4422130312244).

The spelling of 1212120100123 in words is "one trillion, two hundred twelve billion, one hundred twenty million, one hundred thousand, one hundred twenty-three".