2121604255224 has 24 divisors (see below), whose sum is σ = 5746011524760. Its totient is φ = 707201418384.

The previous prime is 2121604255223. The next prime is 2121604255229. The reversal of 2121604255224 is 4225524061212.

2121604255224 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 6 + 0 + 425 + 5 + 224 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121604255223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14733362812 + ... + 14733362955.

It is an arithmetic number, because the mean of its divisors is an integer number (239417146865).

Almost surely, 2^{2121604255224} is an apocalyptic number.

2121604255224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2121604255224 is an abundant number, since it is smaller than the sum of its proper divisors (3624407269536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121604255224 is a wasteful number, since it uses less digits than its factorization.

2121604255224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29466725779 (or 29466725772 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 2121604255224 in words is "two trillion, one hundred twenty-one billion, six hundred four million, two hundred fifty-five thousand, two hundred twenty-four".