7221306721373 has 16 divisors (see below), whose sum is σ = 7903590888960. Its totient is φ = 6577659449856.

The previous prime is 7221306721367. The next prime is 7221306721393. The reversal of 7221306721373 is 3731276031227.

It is not a de Polignac number, because 7221306721373 - 2¹⁰ = 7221306720349 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 (7221306721303) 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, 90233108 + ... + 90313101.

It is an arithmetic number, because the mean of its divisors is an integer number (493974430560).

Almost surely, 2^{7221306721373} is an apocalyptic number.

It is an amenable number.

7221306721373 is a deficient number, since it is larger than the sum of its proper divisors (682284167587).

7221306721373 is a wasteful number, since it uses less digits than its factorization.

7221306721373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180546316.

The product of its (nonzero) digits is 444528, while the sum is 44.

The spelling of 7221306721373 in words is "seven trillion, two hundred twenty-one billion, three hundred six million, seven hundred twenty-one thousand, three hundred seventy-three".