2120021221120 has 144 divisors (see below), whose sum is σ = 5594612859360. Its totient is φ = 763283456000.

The previous prime is 2120021221103. The next prime is 2120021221139. The reversal of 2120021221120 is 211221200212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 2120021221094 and 2120021221103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676686 + ... + 2167474.

It is an arithmetic number, because the mean of its divisors is an integer number (38851478190).

Almost surely, 2^{2120021221120} is an apocalyptic number.

2120021221120 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 2120021221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2797306429680).

2120021221120 is an abundant number, since it is smaller than the sum of its proper divisors (3474591638240).

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

2120021221120 is a wasteful number, since it uses less digits than its factorization.

2120021221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490922 (or 1490908 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2120021221120 its reverse (211221200212), we get a palindrome (2331242421332).

The spelling of 2120021221120 in words is "two trillion, one hundred twenty billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty".