12132321123 has 16 divisors (see below), whose sum is σ = 18337652480. Its totient is φ = 7073093664.

The previous prime is 12132321121. The next prime is 12132321139. The reversal of 12132321123 is 32112323121.

It is not a de Polignac number, because 12132321123 - 2¹ = 12132321121 is a prime.

It is a super-2 number, since 2×12132321123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12132321123.

It is not an unprimeable number, because it can be changed into a prime (12132321121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8185711 + ... + 8187192.

It is an arithmetic number, because the mean of its divisors is an integer number (1146103280).

Almost surely, 2^12132321123 is an apocalyptic number.

12132321123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12132321123 is a deficient number, since it is larger than the sum of its proper divisors (6205331357).

12132321123 is a wasteful number, since it uses less digits than its factorization.

12132321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16372938.

The product of its digits is 432, while the sum is 21.

Adding to 12132321123 its reverse (32112323121), we get a palindrome (44244644244).

The spelling of 12132321123 in words is "twelve billion, one hundred thirty-two million, three hundred twenty-one thousand, one hundred twenty-three".