12002620021 has 48 divisors (see below), whose sum is σ = 15102720000.
Its totient is φ = 9488344320.
The previous prime is 12002619961. The next prime is 12002620031.
12002620021 is nontrivially palindromic in base 10.
It is not a de Polignac number, because 12002620021 - 221 = 12000522869 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 12002619977 and 12002620004.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12002620031) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3478305 + ... + 3481753.
It is an arithmetic number, because the mean of its divisors is an integer number (314640000).
Almost surely, 212002620021 is an apocalyptic number.
It is an amenable number.
12002620021 is a deficient number, since it is larger than the sum of its proper divisors (3100099979).
12002620021 is a wasteful number, since it uses less digits than its factorization.
12002620021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3602 (or 3595 counting only the distinct ones).
The product of its (nonzero) digits is 96, while the sum is 16.
The spelling of 12002620021 in words is "twelve billion, two million, six hundred twenty thousand, twenty-one".