12021132 has 24 divisors (see below), whose sum is σ = 28526400. Its totient is φ = 3938896.

The previous prime is 12021131. The next prime is 12021179. The reversal of 12021132 is 23112021.

Added to its reverse (23112021) it gives a triangular number (35133153 = T₈₃₈₂).

It is a super-2 number, since 2×12021132² = 289015229122848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (12021131) 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, 7782 + ... + 9197.

It is an arithmetic number, because the mean of its divisors is an integer number (1188600).

Almost surely, 2^12021132 is an apocalyptic number.

12021132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12021132 is an abundant number, since it is smaller than the sum of its proper divisors (16505268).

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

12021132 is a wasteful number, since it uses less digits than its factorization.

12021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17045 (or 17043 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12021132 is about 3467.1504149662. The cubic root of 12021132 is about 229.0771591532.

Adding to 12021132 its reverse (23112021), we get a palindrome (35133153).

The spelling of 12021132 in words is "twelve million, twenty-one thousand, one hundred thirty-two".