2121458084 has 24 divisors (see below), whose sum is σ = 4101850368. Its totient is φ = 954926720.

The previous prime is 2121458071. The next prime is 2121458089. The reversal of 2121458084 is 4808541212.

It is not an unprimeable number, because it can be changed into a prime (2121458089) 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, 676652 + ... + 679779.

It is an arithmetic number, because the mean of its divisors is an integer number (170910432).

Almost surely, 2^2121458084 is an apocalyptic number.

It is an amenable number.

2121458084 is a deficient number, since it is larger than the sum of its proper divisors (1980392284).

2121458084 is a wasteful number, since it uses less digits than its factorization.

2121458084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356475 (or 1356473 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The square root of 2121458084 is about 46059.2887917302. The cubic root of 2121458084 is about 1284.9261029335.

Adding to 2121458084 its reverse (4808541212), we get a palindrome (6929999296).

The spelling of 2121458084 in words is "two billion, one hundred twenty-one million, four hundred fifty-eight thousand, eighty-four".