7642112316221 has 16 divisors (see below), whose sum is σ = 7689740313600. Its totient is φ = 7594615871808.

The previous prime is 7642112316169. The next prime is 7642112316239. The reversal of 7642112316221 is 1226132112467.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7642112316221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7642112316521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463346651 + ... + 463363143.

It is an arithmetic number, because the mean of its divisors is an integer number (480608769600).

Almost surely, 2^{7642112316221} is an apocalyptic number.

It is an amenable number.

7642112316221 is a deficient number, since it is larger than the sum of its proper divisors (47627997379).

7642112316221 is a wasteful number, since it uses less digits than its factorization.

7642112316221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20308.

The product of its digits is 48384, while the sum is 38.

Adding to 7642112316221 its reverse (1226132112467), we get a palindrome (8868244428688).

The spelling of 7642112316221 in words is "seven trillion, six hundred forty-two billion, one hundred twelve million, three hundred sixteen thousand, two hundred twenty-one".