12002011020 has 36 divisors (see below), whose sum is σ = 36406100640. Its totient is φ = 3200536224.

The previous prime is 12002011013. The next prime is 12002011051. The reversal of 12002011020 is 2011020021.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 12002010993 and 12002011011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33338740 + ... + 33339099.

Almost surely, 2^12002011020 is an apocalyptic number.

12002011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12002011020 is an abundant number, since it is smaller than the sum of its proper divisors (24404089620).

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

12002011020 is a wasteful number, since it uses less digits than its factorization.

12002011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66677854 (or 66677849 counting only the distinct ones).

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

Adding to 12002011020 its reverse (2011020021), we get a palindrome (14013031041).

Subtracting from 12002011020 its reverse (2011020021), we obtain a palindrome (9990990999).

The spelling of 12002011020 in words is "twelve billion, two million, eleven thousand, twenty".