2121061426 has 32 divisors (see below), whose sum is σ = 3637094400. Its totient is φ = 918289680.

The previous prime is 2121061399. The next prime is 2121061429. The reversal of 2121061426 is 6241601212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121061426.

It is not an unprimeable number, because it can be changed into a prime (2121061429) 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 15 ways as a sum of consecutive naturals, for example, 112165 + ... + 129703.

It is an arithmetic number, because the mean of its divisors is an integer number (113659200).

Almost surely, 2^2121061426 is an apocalyptic number.

2121061426 is a deficient number, since it is larger than the sum of its proper divisors (1516032974).

2121061426 is a wasteful number, since it uses less digits than its factorization.

2121061426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17814.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2121061426 is about 46054.9826403181. The cubic root of 2121061426 is about 1284.8460152506.

Adding to 2121061426 its reverse (6241601212), we get a palindrome (8362662638).

The spelling of 2121061426 in words is "two billion, one hundred twenty-one million, sixty-one thousand, four hundred twenty-six".