12021200420021 has 8 divisors (see below), whose sum is σ = 13508773716480. Its totient is φ = 10614036490992.

The previous prime is 12021200420017. The next prime is 12021200420071. The reversal of 12021200420021 is 12002400212021.

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 12021200420021 - 2² = 12021200420017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021200420011) 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, 20102341541 + ... + 20102342138.

It is an arithmetic number, because the mean of its divisors is an integer number (1688596714560).

Almost surely, 2^{12021200420021} is an apocalyptic number.

It is an amenable number.

12021200420021 is a deficient number, since it is larger than the sum of its proper divisors (1487573296459).

12021200420021 is a wasteful number, since it uses less digits than its factorization.

12021200420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40204683715.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12021200420021 its reverse (12002400212021), we get a palindrome (24023600632042).

The spelling of 12021200420021 in words is "twelve trillion, twenty-one billion, two hundred million, four hundred twenty thousand, twenty-one".