2121131303112 has 128 divisors (see below), whose sum is σ = 5628695184000. Its totient is φ = 664920668160.

The previous prime is 2121131303063. The next prime is 2121131303117. The reversal of 2121131303112 is 2113031311212.

It is a super-2 number, since 2×2121131303112² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121131303117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17431939 + ... + 17553197.

It is an arithmetic number, because the mean of its divisors is an integer number (43974181125).

Almost surely, 2^{2121131303112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121131303112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2814347592000).

2121131303112 is an abundant number, since it is smaller than the sum of its proper divisors (3507563880888).

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

2121131303112 is a wasteful number, since it uses less digits than its factorization.

2121131303112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121951 (or 121947 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 2121131303112 its reverse (2113031311212), we get a palindrome (4234162614324).

The spelling of 2121131303112 in words is "two trillion, one hundred twenty-one billion, one hundred thirty-one million, three hundred three thousand, one hundred twelve".