12021210012 has 24 divisors (see below), whose sum is σ = 32056560256. Its totient is φ = 3434631408.

The previous prime is 12021210011. The next prime is 12021210013. The reversal of 12021210012 is 21001212021.

It is an interprime number because it is at equal distance from previous prime (12021210011) and next prime (12021210013).

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

It is a self number, because there is not a number n which added to its sum of digits gives 12021210012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021210011) 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, 71554738 + ... + 71554905.

Almost surely, 2^12021210012 is an apocalyptic number.

12021210012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12021210012 is an abundant number, since it is smaller than the sum of its proper divisors (20035350244).

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

12021210012 is a wasteful number, since it uses less digits than its factorization.

12021210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143109657 (or 143109655 counting only the distinct ones).

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

Adding to 12021210012 its reverse (21001212021), we get a palindrome (33022422033).

It can be divided in two parts, 12021 and 210012, that multiplied together give a palindrome (2524554252).

The spelling of 12021210012 in words is "twelve billion, twenty-one million, two hundred ten thousand, twelve".