2120021023200 has 144 divisors (see below), whose sum is σ = 6911821365120. Its totient is φ = 564425233920.

The previous prime is 2120021023163. The next prime is 2120021023259. The reversal of 2120021023200 is 23201200212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2120021023200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 772077 + ... + 2199123.

It is an arithmetic number, because the mean of its divisors is an integer number (47998759480).

Almost surely, 2^{2120021023200} is an apocalyptic number.

2120021023200 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 2120021023200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3455910682560).

2120021023200 is an abundant number, since it is smaller than the sum of its proper divisors (4791800341920).

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

2120021023200 is a wasteful number, since it uses less digits than its factorization.

2120021023200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427689 (or 1427676 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 2120021023200 its reverse (23201200212), we get a palindrome (2143222223412).

The spelling of 2120021023200 in words is "two trillion, one hundred twenty billion, twenty-one million, twenty-three thousand, two hundred".