12021212232 has 24 divisors (see below), whose sum is σ = 32557449990. Its totient is φ = 4007070720.

The previous prime is 12021212221. The next prime is 12021212237. The reversal of 12021212232 is 23221212021.

It can be written as a sum of positive squares in only one way, i.e., 11743189956 + 278022276 = 108366^2 + 16674^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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 (12021212237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83480569 + ... + 83480712.

Almost surely, 2^12021212232 is an apocalyptic number.

12021212232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12021212232 is an abundant number, since it is smaller than the sum of its proper divisors (20536237758).

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

12021212232 is a wasteful number, since it uses less digits than its factorization.

12021212232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166961293 (or 166961286 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12021212232 its reverse (23221212021), we get a palindrome (35242424253).

The spelling of 12021212232 in words is "twelve billion, twenty-one million, two hundred twelve thousand, two hundred thirty-two".