7220647784321 has 32 divisors (see below), whose sum is σ = 7744968887040. Its totient is φ = 6707833344000.

The previous prime is 7220647784297. The next prime is 7220647784327. The reversal of 7220647784321 is 1234877460227.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-7220647784321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7220647784327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1154008025 + ... + 1154014281.

It is an arithmetic number, because the mean of its divisors is an integer number (242030277720).

Almost surely, 2^{7220647784321} is an apocalyptic number.

It is an amenable number.

7220647784321 is a deficient number, since it is larger than the sum of its proper divisors (524321102719).

7220647784321 is a wasteful number, since it uses less digits than its factorization.

7220647784321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8345.

The product of its (nonzero) digits is 6322176, while the sum is 53.

The spelling of 7220647784321 in words is "seven trillion, two hundred twenty billion, six hundred forty-seven million, seven hundred eighty-four thousand, three hundred twenty-one".