20202000121221 has 32 divisors (see below), whose sum is σ = 27274729896960. Its totient is φ = 13299391897344.

The previous prime is 20202000121217. The next prime is 20202000121241. The reversal of 20202000121221 is 12212100020202.

It is not a de Polignac number, because 20202000121221 - 2² = 20202000121217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20202000121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202000121241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 710498221 + ... + 710526653.

It is an arithmetic number, because the mean of its divisors is an integer number (852335309280).

Almost surely, 2^{20202000121221} is an apocalyptic number.

It is an amenable number.

20202000121221 is a deficient number, since it is larger than the sum of its proper divisors (7072729775739).

20202000121221 is a wasteful number, since it uses less digits than its factorization.

20202000121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34985.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20202000121221 its reverse (12212100020202), we get a palindrome (32414100141423).

The spelling of 20202000121221 in words is "twenty trillion, two hundred two billion, one hundred twenty-one thousand, two hundred twenty-one".