2121255004 has 12 divisors (see below), whose sum is σ = 4049668728. Its totient is φ = 964206800.

The previous prime is 2121254999. The next prime is 2121255043. The reversal of 2121255004 is 4005521212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

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, 24105127 + ... + 24105214.

It is an arithmetic number, because the mean of its divisors is an integer number (337472394).

Almost surely, 2^2121255004 is an apocalyptic number.

It is an amenable number.

2121255004 is a deficient number, since it is larger than the sum of its proper divisors (1928413724).

2121255004 is a wasteful number, since it uses less digits than its factorization.

2121255004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48210356 (or 48210354 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2121255004 is about 46057.0841890800. The cubic root of 2121255004 is about 1284.8851010833.

Adding to 2121255004 its reverse (4005521212), we get a palindrome (6126776216).

The spelling of 2121255004 in words is "two billion, one hundred twenty-one million, two hundred fifty-five thousand, four".