20013002001221 has 8 divisors (see below), whose sum is σ = 20174721177600. Its totient is φ = 19851347457648.

The previous prime is 20013002001217. The next prime is 20013002001247. The reversal of 20013002001221 is 12210020031002.

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 20013002001221 - 2² = 20013002001217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20013002001196 and 20013002001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013002001821) 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 7 ways as a sum of consecutive naturals, for example, 15536321 + ... + 16775078.

It is an arithmetic number, because the mean of its divisors is an integer number (2521840147200).

Almost surely, 2^{20013002001221} is an apocalyptic number.

It is an amenable number.

20013002001221 is a deficient number, since it is larger than the sum of its proper divisors (161719176379).

20013002001221 is a wasteful number, since it uses less digits than its factorization.

20013002001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32316403.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20013002001221 its reverse (12210020031002), we get a palindrome (32223022032223).

The spelling of 20013002001221 in words is "twenty trillion, thirteen billion, two million, one thousand, two hundred twenty-one".