12002011021 has 48 divisors (see below), whose sum is σ = 16696229760. Its totient is φ = 8322168960.

The previous prime is 12002011013. The next prime is 12002011051. The reversal of 12002011021 is 12011020021.

It is not a de Polignac number, because 12002011021 - 2³ = 12002011013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12002010989 and 12002011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002011001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18665326 + ... + 18665968.

It is an arithmetic number, because the mean of its divisors is an integer number (347838120).

Almost surely, 2^12002011021 is an apocalyptic number.

12002011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12002011021 is a deficient number, since it is larger than the sum of its proper divisors (4694218739).

12002011021 is an equidigital number, since it uses as much as digits as its factorization.

12002011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12002011021 its reverse (12011020021), we get a palindrome (24013031042).

The spelling of 12002011021 in words is "twelve billion, two million, eleven thousand, twenty-one".