2120021210000 has 100 divisors (see below), whose sum is σ = 5434712219772. Its totient is φ = 798125568000.

The previous prime is 2120021209997. The next prime is 2120021210023. The reversal of 2120021210000 is 121200212.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 1816327634944 + 303693575056 = 1347712^2 + 551084^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6065357 + ... + 6405356.

Almost surely, 2^{2120021210000} is an apocalyptic number.

2120021210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120021210000 is an abundant number, since it is smaller than the sum of its proper divisors (3314691009772).

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

2120021210000 is a wasteful number, since it uses less digits than its factorization.

2120021210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12470758 (or 12470737 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2120021210000 its reverse (121200212), we get a palindrome (2120142410212).

The spelling of 2120021210000 in words is "two trillion, one hundred twenty billion, twenty-one million, two hundred ten thousand".