2121306061 has 8 divisors (see below), whose sum is σ = 2424726144. Its totient is φ = 1817980080.

The previous prime is 2121306059. The next prime is 2121306067. The reversal of 2121306061 is 1606031212.

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

It is not a de Polignac number, because 2121306061 - 2¹ = 2121306059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121306067) 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 7 ways as a sum of consecutive naturals, for example, 34251 + ... + 73591.

It is an arithmetic number, because the mean of its divisors is an integer number (303090768).

Almost surely, 2^2121306061 is an apocalyptic number.

It is an amenable number.

2121306061 is a deficient number, since it is larger than the sum of its proper divisors (303420083).

2121306061 is an equidigital number, since it uses as much as digits as its factorization.

2121306061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47051.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2121306061 is about 46057.6384652969. The cubic root of 2121306061 is about 1284.8954097374.

Adding to 2121306061 its reverse (1606031212), we get a palindrome (3727337273).

The spelling of 2121306061 in words is "two billion, one hundred twenty-one million, three hundred six thousand, sixty-one".