2121343043 has 4 divisors (see below), whose sum is σ = 2121435240. Its totient is φ = 2121250848.

The previous prime is 2121343039. The next prime is 2121343093. The reversal of 2121343043 is 3403431212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2121343043 - 2² = 2121343039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121343013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20171 + ... + 68187.

It is an arithmetic number, because the mean of its divisors is an integer number (530358810).

Almost surely, 2^2121343043 is an apocalyptic number.

2121343043 is a deficient number, since it is larger than the sum of its proper divisors (92197).

2121343043 is an equidigital number, since it uses as much as digits as its factorization.

2121343043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92196.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 2121343043 is about 46058.0399387555. The cubic root of 2121343043 is about 1284.9028764779.

Adding to 2121343043 its reverse (3403431212), we get a palindrome (5524774255).

The spelling of 2121343043 in words is "two billion, one hundred twenty-one million, three hundred forty-three thousand, forty-three".