20002121123320 has 64 divisors (see below), whose sum is σ = 51517931613120. Its totient is φ = 6846682650624.

The previous prime is 20002121123273. The next prime is 20002121123321. The reversal of 20002121123320 is 2332112120002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002121123321) 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, 58096017 + ... + 58439296.

It is an arithmetic number, because the mean of its divisors is an integer number (804967681455).

Almost surely, 2^{20002121123320} is an apocalyptic number.

20002121123320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002121123320 is an abundant number, since it is smaller than the sum of its proper divisors (31515810489800).

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

20002121123320 is a wasteful number, since it uses less digits than its factorization.

20002121123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116535944 (or 116535940 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20002121123320 its reverse (2332112120002), we get a palindrome (22334233243322).

The spelling of 20002121123320 in words is "twenty trillion, two billion, one hundred twenty-one million, one hundred twenty-three thousand, three hundred twenty".