221651320661353 has 8 divisors (see below), whose sum is σ = 241813682210016. Its totient is φ = 201490999360800.

The previous prime is 221651320661339. The next prime is 221651320661461. The reversal of 221651320661353 is 353166023156122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221651320661353 - 2⁵ = 221651320661321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221651320664353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509834863 + ... + 510269428.

It is an arithmetic number, because the mean of its divisors is an integer number (30226710276252).

Almost surely, 2^{221651320661353} is an apocalyptic number.

It is an amenable number.

221651320661353 is a deficient number, since it is larger than the sum of its proper divisors (20162361548663).

221651320661353 is a wasteful number, since it uses less digits than its factorization.

221651320661353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020124055.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 221651320661353 in words is "two hundred twenty-one trillion, six hundred fifty-one billion, three hundred twenty million, six hundred sixty-one thousand, three hundred fifty-three".