2121022101120 has 256 divisors, whose sum is σ = 7383369127680. Its totient is φ = 514743828480.

The previous prime is 2121022101119. The next prime is 2121022101151. The reversal of 2121022101120 is 211012201212.

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 2121022101120.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1173732 + ... + 2370588.

It is an arithmetic number, because the mean of its divisors is an integer number (28841285655).

Almost surely, 2^{2121022101120} is an apocalyptic number.

2121022101120 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 2121022101120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3691684563840).

2121022101120 is an abundant number, since it is smaller than the sum of its proper divisors (5262347026560).

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

2121022101120 is a wasteful number, since it uses less digits than its factorization.

2121022101120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196963 (or 1196951 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2121022101120 its reverse (211012201212), we get a palindrome (2332034302332).

The spelling of 2121022101120 in words is "two trillion, one hundred twenty-one billion, twenty-two million, one hundred one thousand, one hundred twenty".