12101031221123 has 32 divisors (see below), whose sum is σ = 13216954114560. Its totient is φ = 11012138438400.

The previous prime is 12101031221093. The next prime is 12101031221131. The reversal of 12101031221123 is 32112213010121.

It is a cyclic number.

It is not a de Polignac number, because 12101031221123 - 2²⁰ = 12101030172547 is a prime.

It is a super-2 number, since 2×12101031221123² (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 = 12101031221095 and 12101031221104.

It is not an unprimeable number, because it can be changed into a prime (12101031227123) 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 31 ways as a sum of consecutive naturals, for example, 2735930690 + ... + 2735935112.

It is an arithmetic number, because the mean of its divisors is an integer number (413029816080).

Almost surely, 2^{12101031221123} is an apocalyptic number.

12101031221123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12101031221123 is a deficient number, since it is larger than the sum of its proper divisors (1115922893437).

12101031221123 is a wasteful number, since it uses less digits than its factorization.

12101031221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9339.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12101031221123 its reverse (32112213010121), we get a palindrome (44213244231244).

The spelling of 12101031221123 in words is "twelve trillion, one hundred one billion, thirty-one million, two hundred twenty-one thousand, one hundred twenty-three".