12002001020 has 48 divisors (see below), whose sum is σ = 26701200288. Its totient is φ = 4515962880.

The previous prime is 12002001019. The next prime is 12002001023. The reversal of 12002001020 is 2010020021.

It is a junction number, because it is equal to n+sod(n) for n = 12002000989 and 12002001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002001023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699059 + ... + 716021.

It is an arithmetic number, because the mean of its divisors is an integer number (556275006).

Almost surely, 2^12002001020 is an apocalyptic number.

12002001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12002001020 is an abundant number, since it is smaller than the sum of its proper divisors (14699199268).

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

12002001020 is a wasteful number, since it uses less digits than its factorization.

12002001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19070 (or 19068 counting only the distinct ones).

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

Adding to 12002001020 its reverse (2010020021), we get a palindrome (14012021041).

The spelling of 12002001020 in words is "twelve billion, two million, one thousand, twenty".