2121451043 has 8 divisors (see below), whose sum is σ = 2127630240. Its totient is φ = 2115280960.

The previous prime is 2121451027. The next prime is 2121451049. The reversal of 2121451043 is 3401541212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121451043 - 2⁴ = 2121451027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121451049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039418 + ... + 1041456.

It is an arithmetic number, because the mean of its divisors is an integer number (265953780).

Almost surely, 2^2121451043 is an apocalyptic number.

2121451043 is a deficient number, since it is larger than the sum of its proper divisors (6179197).

2121451043 is a wasteful number, since it uses less digits than its factorization.

2121451043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2121451043 is about 46059.2123575729. The cubic root of 2121451043 is about 1284.9246813995.

Adding to 2121451043 its reverse (3401541212), we get a palindrome (5522992255).

The spelling of 2121451043 in words is "two billion, one hundred twenty-one million, four hundred fifty-one thousand, forty-three".