12001212 has 18 divisors (see below), whose sum is σ = 30336488. Its totient is φ = 4000392.

The previous prime is 12001211. The next prime is 12001261. The reversal of 12001212 is 21210021.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (9).

12001212 is a modest number, since divided by 1212 gives 1200 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12001194 and 12001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001211) 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, 166648 + ... + 166719.

Almost surely, 2^12001212 is an apocalyptic number.

12001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12001212 is an abundant number, since it is smaller than the sum of its proper divisors (18335276).

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

12001212 is a wasteful number, since it uses less digits than its factorization.

12001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333377 (or 333372 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 12001212 is about 3464.2765478524. The cubic root of 12001212 is about 228.9505559938.

Adding to 12001212 its reverse (21210021), we get a palindrome (33211233).

The spelling of 12001212 in words is "twelve million, one thousand, two hundred twelve".