4221621637004 has 12 divisors (see below), whose sum is σ = 7446009817344. Its totient is φ = 2094190260624.

The previous prime is 4221621636971. The next prime is 4221621637007. The reversal of 4221621637004 is 4007361261224.

It is a happy number.

4221621637004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (4221621637007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4155138899 + ... + 4155139914.

It is an arithmetic number, because the mean of its divisors is an integer number (620500818112).

Almost surely, 2^{4221621637004} is an apocalyptic number.

It is an amenable number.

4221621637004 is a deficient number, since it is larger than the sum of its proper divisors (3224388180340).

4221621637004 is a wasteful number, since it uses less digits than its factorization.

4221621637004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8310278944 (or 8310278942 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

Adding to 4221621637004 its reverse (4007361261224), we get a palindrome (8228982898228).

The spelling of 4221621637004 in words is "four trillion, two hundred twenty-one billion, six hundred twenty-one million, six hundred thirty-seven thousand, four".