12002021000021 has 8 divisors (see below), whose sum is σ = 12935909010360. Its totient is φ = 11069655221952.

The previous prime is 12002021000017. The next prime is 12002021000089. The reversal of 12002021000021 is 12000012020021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 621552484996 + 11380468515025 = 788386^2 + 3373495^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12002021000021 - 2² = 12002021000017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002020999966 and 12002021000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002021090021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380541686 + ... + 380573223.

It is an arithmetic number, because the mean of its divisors is an integer number (1616988626295).

Almost surely, 2^{12002021000021} is an apocalyptic number.

It is an amenable number.

12002021000021 is a deficient number, since it is larger than the sum of its proper divisors (933888010339).

12002021000021 is a wasteful number, since it uses less digits than its factorization.

12002021000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761116135.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12002021000021 its reverse (12000012020021), we get a palindrome (24002033020042).

The spelling of 12002021000021 in words is "twelve trillion, two billion, twenty-one million, twenty-one", and thus it is an aban number and an uban number.