12023121132 has 36 divisors (see below), whose sum is σ = 33154668456. Its totient is φ = 3643369920.

The previous prime is 12023121109. The next prime is 12023121133. The reversal of 12023121132 is 23112132021.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12023121132² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12023121133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15180313 + ... + 15181104.

Almost surely, 2^12023121132 is an apocalyptic number.

12023121132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12023121132 is an abundant number, since it is smaller than the sum of its proper divisors (21131547324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12023121132 is a wasteful number, since it uses less digits than its factorization.

12023121132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30361438 (or 30361433 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12023121132 its reverse (23112132021), we get a palindrome (35135253153).

The spelling of 12023121132 in words is "twelve billion, twenty-three million, one hundred twenty-one thousand, one hundred thirty-two".