2121145304 has 16 divisors (see below), whose sum is σ = 3978816000. Its totient is φ = 1060127712.

The previous prime is 2121145303. The next prime is 2121145321. The reversal of 2121145304 is 4035411212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121145304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121145303) 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 3 ways as a sum of consecutive naturals, for example, 34904 + ... + 73895.

It is an arithmetic number, because the mean of its divisors is an integer number (248676000).

Almost surely, 2^2121145304 is an apocalyptic number.

It is an amenable number.

2121145304 is a deficient number, since it is larger than the sum of its proper divisors (1857670696).

2121145304 is a wasteful number, since it uses less digits than its factorization.

2121145304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111242 (or 111238 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2121145304 is about 46055.8932602550. The cubic root of 2121145304 is about 1284.8629515656.

Adding to 2121145304 its reverse (4035411212), we get a palindrome (6156556516).

The spelling of 2121145304 in words is "two billion, one hundred twenty-one million, one hundred forty-five thousand, three hundred four".