2121426004 has 12 divisors (see below), whose sum is σ = 3715615764. Its totient is φ = 1059821504.

The previous prime is 2121425993. The next prime is 2121426017. The reversal of 2121426004 is 4006241212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 666156100 + 1455269904 = 25810^2 + 38148^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217507 + ... + 227050.

It is an arithmetic number, because the mean of its divisors is an integer number (309634647).

Almost surely, 2^2121426004 is an apocalyptic number.

It is an amenable number.

2121426004 is a deficient number, since it is larger than the sum of its proper divisors (1594189760).

2121426004 is a wasteful number, since it uses less digits than its factorization.

2121426004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445754 (or 445752 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 2121426004 is about 46058.9405436122. The cubic root of 2121426004 is about 1284.9196261558.

Adding to 2121426004 its reverse (4006241212), we get a palindrome (6127667216).

The spelling of 2121426004 in words is "two billion, one hundred twenty-one million, four hundred twenty-six thousand, four".