12002010021 has 12 divisors (see below), whose sum is σ = 17376465600. Its totient is φ = 7982772840.

The previous prime is 12002010017. The next prime is 12002010037. The reversal of 12002010021 is 12001020021.

It is not a de Polignac number, because 12002010021 - 2² = 12002010017 is a prime.

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 = 12002009985 and 12002010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002010071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1543171 + ... + 1550928.

It is an arithmetic number, because the mean of its divisors is an integer number (1448038800).

Almost surely, 2^12002010021 is an apocalyptic number.

It is an amenable number.

12002010021 is a deficient number, since it is larger than the sum of its proper divisors (5374455579).

12002010021 is a wasteful number, since it uses less digits than its factorization.

12002010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094536 (or 3094533 counting only the distinct ones).

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

Adding to 12002010021 its reverse (12001020021), we get a palindrome (24003030042).

The spelling of 12002010021 in words is "twelve billion, two million, ten thousand, twenty-one".