20021200212001 has 8 divisors (see below), whose sum is σ = 21075064493600. Its totient is φ = 18967347620640.

The previous prime is 20021200211989. The next prime is 20021200212007. The reversal of 20021200212001 is 10021200212002.

It is a happy number.

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 20021200212001 - 2⁹ = 20021200211489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021200212007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708565 + ... + 6367453.

It is an arithmetic number, because the mean of its divisors is an integer number (2634383061700).

Almost surely, 2^{20021200212001} is an apocalyptic number.

It is an amenable number.

20021200212001 is a deficient number, since it is larger than the sum of its proper divisors (1053864281599).

20021200212001 is a wasteful number, since it uses less digits than its factorization.

20021200212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5845119.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021200212001 its reverse (10021200212002), we get a palindrome (30042400424003).

Subtracting from 20021200212001 its reverse (10021200212002), we obtain a palindrome (9999999999999).

The spelling of 20021200212001 in words is "twenty trillion, twenty-one billion, two hundred million, two hundred twelve thousand, one".