12021372 has 60 divisors (see below), whose sum is σ = 34293336. Its totient is φ = 3641760.

The previous prime is 12021367. The next prime is 12021403. The reversal of 12021372 is 27312021.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1878 + ... + 5250.

Almost surely, 2^12021372 is an apocalyptic number.

12021372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17146668).

12021372 is an abundant number, since it is smaller than the sum of its proper divisors (22271964).

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

12021372 is a wasteful number, since it uses less digits than its factorization.

12021372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400 (or 3389 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 12021372 is about 3467.1850253484. The cubic root of 12021372 is about 229.0786836395.

Adding to 12021372 its reverse (27312021), we get a palindrome (39333393).

The spelling of 12021372 in words is "twelve million, twenty-one thousand, three hundred seventy-two".