12001201212 has 96 divisors (see below), whose sum is σ = 37598206464. Its totient is φ = 2877408000.

The previous prime is 12001201189. The next prime is 12001201231. The reversal of 12001201212 is 21210210021.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 487539 + ... + 511562.

It is an arithmetic number, because the mean of its divisors is an integer number (391647984).

Almost surely, 2^12001201212 is an apocalyptic number.

12001201212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12001201212 is an abundant number, since it is smaller than the sum of its proper divisors (25597005252).

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

12001201212 is a wasteful number, since it uses less digits than its factorization.

12001201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999139 (or 999137 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12001201212 its reverse (21210210021), we get a palindrome (33211411233).

The spelling of 12001201212 in words is "twelve billion, one million, two hundred one thousand, two hundred twelve".