20002121220320 has 96 divisors (see below), whose sum is σ = 47689873979328. Its totient is φ = 7927527149568.

The previous prime is 20002121220311. The next prime is 20002121220329. The reversal of 20002121220320 is 2302212120002.

It is an interprime number because it is at equal distance from previous prime (20002121220311) and next prime (20002121220329).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002121220329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7167542 + ... + 9559178.

It is an arithmetic number, because the mean of its divisors is an integer number (496769520618).

Almost surely, 2^{20002121220320} is an apocalyptic number.

20002121220320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20002121220320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23844936989664).

20002121220320 is an abundant number, since it is smaller than the sum of its proper divisors (27687752759008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20002121220320 is a wasteful number, since it uses less digits than its factorization.

20002121220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392132 (or 2392124 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20002121220320 its reverse (2302212120002), we get a palindrome (22304333340322).

The spelling of 20002121220320 in words is "twenty trillion, two billion, one hundred twenty-one million, two hundred twenty thousand, three hundred twenty".