12101010101123 has 4 divisors (see below), whose sum is σ = 12382428940728. Its totient is φ = 11819591261520.

The previous prime is 12101010101119. The next prime is 12101010101171. The reversal of 12101010101123 is 32110101010121.

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 12101010101123 - 2² = 12101010101119 is a prime.

It is a super-2 number, since 2×12101010101123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101010101098 and 12101010101107.

It is not an unprimeable number, because it can be changed into a prime (12101010101113) 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 in 3 ways as a sum of consecutive naturals, for example, 140709419738 + ... + 140709419823.

It is an arithmetic number, because the mean of its divisors is an integer number (3095607235182).

Almost surely, 2^{12101010101123} is an apocalyptic number.

12101010101123 is a deficient number, since it is larger than the sum of its proper divisors (281418839605).

12101010101123 is an equidigital number, since it uses as much as digits as its factorization.

12101010101123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281418839604.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 12101010101123 its reverse (32110101010121), we get a palindrome (44211111111244).

The spelling of 12101010101123 in words is "twelve trillion, one hundred one billion, ten million, one hundred one thousand, one hundred twenty-three".