2121131444140 has 24 divisors (see below), whose sum is σ = 4688816877360. Its totient is φ = 803797178688.

The previous prime is 2121131444137. The next prime is 2121131444143. The reversal of 2121131444140 is 414441311212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2121131444137) and next prime (2121131444143).

It is a junction number, because it is equal to n+sod(n) for n = 2121131444099 and 2121131444108.

It is not an unprimeable number, because it can be changed into a prime (2121131444143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2790962047 + ... + 2790962806.

It is an arithmetic number, because the mean of its divisors is an integer number (195367369890).

Almost surely, 2^{2121131444140} is an apocalyptic number.

2121131444140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121131444140 is an abundant number, since it is smaller than the sum of its proper divisors (2567685433220).

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

2121131444140 is a wasteful number, since it uses less digits than its factorization.

2121131444140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5581924881 (or 5581924879 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 2121131444140 its reverse (414441311212), we get a palindrome (2535572755352).

The spelling of 2121131444140 in words is "two trillion, one hundred twenty-one billion, one hundred thirty-one million, four hundred forty-four thousand, one hundred forty".