2121058541 has 6 divisors (see below), whose sum is σ = 2467353870. Its totient is φ = 1818050136.

The previous prime is 2121058507. The next prime is 2121058543. The reversal of 2121058541 is 1458501212.

It can be written as a sum of positive squares in only one way, i.e., 1881737641 + 239320900 = 43379^2 + 15470^2 .

It is not a de Polignac number, because 2121058541 - 2²² = 2116864237 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121058543) 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 5 ways as a sum of consecutive naturals, for example, 21643406 + ... + 21643503.

It is an arithmetic number, because the mean of its divisors is an integer number (411225645).

Almost surely, 2^2121058541 is an apocalyptic number.

It is an amenable number.

2121058541 is a deficient number, since it is larger than the sum of its proper divisors (346295329).

2121058541 is an equidigital number, since it uses as much as digits as its factorization.

2121058541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43286923 (or 43286916 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 2121058541 is about 46054.9513190493. The cubic root of 2121058541 is about 1284.8454327148.

Adding to 2121058541 its reverse (1458501212), we get a palindrome (3579559753).

The spelling of 2121058541 in words is "two billion, one hundred twenty-one million, fifty-eight thousand, five hundred forty-one".