12012021210 has 64 divisors (see below), whose sum is σ = 33619680000. Its totient is φ = 2745602496.

The previous prime is 12012021199. The next prime is 12012021221. The reversal of 12012021210 is 1212021021.

It is an interprime number because it is at equal distance from previous prime (12012021199) and next prime (12012021221).

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, 573385 + ... + 593964.

It is an arithmetic number, because the mean of its divisors is an integer number (525307500).

Almost surely, 2^12012021210 is an apocalyptic number.

12012021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12012021210 is an abundant number, since it is smaller than the sum of its proper divisors (21607658790).

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

12012021210 is a wasteful number, since it uses less digits than its factorization.

12012021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167380 (or 1167366 counting only the distinct ones).

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

Adding to 12012021210 its reverse (1212021021), we get a palindrome (13224042231).

The spelling of 12012021210 in words is "twelve billion, twelve million, twenty-one thousand, two hundred ten".