12030021132 has 24 divisors (see below), whose sum is σ = 28318460016. Its totient is φ = 3974519808.

The previous prime is 12030021127. The next prime is 12030021137. The reversal of 12030021132 is 23112003021.

It is an interprime number because it is at equal distance from previous prime (12030021127) and next prime (12030021137).

It is a super-2 number, since 2×12030021132² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12030021137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4434493 + ... + 4437204.

It is an arithmetic number, because the mean of its divisors is an integer number (1179935834).

Almost surely, 2^12030021132 is an apocalyptic number.

12030021132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12030021132 is an abundant number, since it is smaller than the sum of its proper divisors (16288438884).

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

12030021132 is a wasteful number, since it uses less digits than its factorization.

12030021132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8871817 (or 8871815 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12030021132 its reverse (23112003021), we get a palindrome (35142024153).

The spelling of 12030021132 in words is "twelve billion, thirty million, twenty-one thousand, one hundred thirty-two".