4321721126552 has 16 divisors (see below), whose sum is σ = 8174937088440. Its totient is φ = 2141737902976.

The previous prime is 4321721126539. The next prime is 4321721126573. The reversal of 4321721126552 is 2556211271234.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2390331578 + ... + 2390333385.

Almost surely, 2^{4321721126552} is an apocalyptic number.

It is an amenable number.

4321721126552 is a deficient number, since it is larger than the sum of its proper divisors (3853215961888).

4321721126552 is a wasteful number, since it uses less digits than its factorization.

4321721126552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4780665082 (or 4780665078 counting only the distinct ones).

The product of its digits is 201600, while the sum is 41.

Adding to 4321721126552 its reverse (2556211271234), we get a palindrome (6877932397786).

The spelling of 4321721126552 in words is "four trillion, three hundred twenty-one billion, seven hundred twenty-one million, one hundred twenty-six thousand, five hundred fifty-two".