2120121021300 has 144 divisors (see below), whose sum is σ = 6267785002752. Its totient is φ = 553066905600.

The previous prime is 2120121021281. The next prime is 2120121021349. The reversal of 2120121021300 is 31201210212.

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 2120121021300.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 29757720 + ... + 29828880.

Almost surely, 2^{2120121021300} is an apocalyptic number.

2120121021300 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 2120121021300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3133892501376).

2120121021300 is an abundant number, since it is smaller than the sum of its proper divisors (4147663981452).

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

2120121021300 is a wasteful number, since it uses less digits than its factorization.

2120121021300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73338 (or 73331 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 2120121021300 its reverse (31201210212), we get a palindrome (2151322231512).

The spelling of 2120121021300 in words is "two trillion, one hundred twenty billion, one hundred twenty-one million, twenty-one thousand, three hundred".