12020211972 has 48 divisors (see below), whose sum is σ = 32238124800. Its totient is φ = 3868572960.

The previous prime is 12020211971. The next prime is 12020211979. The reversal of 12020211972 is 27911202021.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12020211971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1915804 + ... + 1922067.

It is an arithmetic number, because the mean of its divisors is an integer number (671627600).

Almost surely, 2^12020211972 is an apocalyptic number.

12020211972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12020211972 is an abundant number, since it is smaller than the sum of its proper divisors (20217912828).

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

12020211972 is a wasteful number, since it uses less digits than its factorization.

12020211972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837913 (or 3837905 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

Adding to 12020211972 its reverse (27911202021), we get a palindrome (39931413993).

The spelling of 12020211972 in words is "twelve billion, twenty million, two hundred eleven thousand, nine hundred seventy-two".