2121868743 has 32 divisors (see below), whose sum is σ = 2923776000. Its totient is φ = 1368249696.

The previous prime is 2121868733. The next prime is 2121868747. The reversal of 2121868743 is 3478681212.

It is not a de Polignac number, because 2121868743 - 2¹⁰ = 2121867719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121868695 and 2121868704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121868747) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3768580 + ... + 3769142.

It is an arithmetic number, because the mean of its divisors is an integer number (91368000).

Almost surely, 2^2121868743 is an apocalyptic number.

2121868743 is a deficient number, since it is larger than the sum of its proper divisors (801907257).

2121868743 is a wasteful number, since it uses less digits than its factorization.

2121868743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931.

The product of its digits is 129024, while the sum is 42.

The square root of 2121868743 is about 46063.7465150198. The cubic root of 2121868743 is about 1285.0090069872.

The spelling of 2121868743 in words is "two billion, one hundred twenty-one million, eight hundred sixty-eight thousand, seven hundred forty-three".