2121101321120 has 48 divisors (see below), whose sum is σ = 5026909883688. Its totient is φ = 845764039680.

The previous prime is 2121101321117. The next prime is 2121101321159. The reversal of 2121101321120 is 211231011212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1364625821584 + 756475499536 = 1168172^2 + 869756^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20859191 + ... + 20960630.

Almost surely, 2^{2121101321120} is an apocalyptic number.

2121101321120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121101321120 is an abundant number, since it is smaller than the sum of its proper divisors (2905808562568).

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

2121101321120 is a wasteful number, since it uses less digits than its factorization.

2121101321120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41820153 (or 41820145 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2121101321120 its reverse (211231011212), we get a palindrome (2332332332332).

The spelling of 2121101321120 in words is "two trillion, one hundred twenty-one billion, one hundred one million, three hundred twenty-one thousand, one hundred twenty".