2121312505044 has 24 divisors (see below), whose sum is σ = 5240889718848. Its totient is φ = 665509805440.

The previous prime is 2121312505007. The next prime is 2121312505097. The reversal of 2121312505044 is 4405052131212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5199295152 + ... + 5199295559.

It is an arithmetic number, because the mean of its divisors is an integer number (218370404952).

Almost surely, 2^{2121312505044} is an apocalyptic number.

It is an amenable number.

2121312505044 is an abundant number, since it is smaller than the sum of its proper divisors (3119577213804).

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

2121312505044 is a wasteful number, since it uses less digits than its factorization.

2121312505044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10398590735 (or 10398590733 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 2121312505044 its reverse (4405052131212), we get a palindrome (6526364636256).

The spelling of 2121312505044 in words is "two trillion, one hundred twenty-one billion, three hundred twelve million, five hundred five thousand, forty-four".