221411640666323 has 4 divisors (see below), whose sum is σ = 221441213485440. Its totient is φ = 221382067847208.

The previous prime is 221411640666289. The next prime is 221411640666379. The reversal of 221411640666323 is 323666046114122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221411640666323 - 2⁶ = 221411640666259 is a prime.

It is a super-2 number, since 2×221411640666323² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221411640660323) 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, 14786398328 + ... + 14786413301.

It is an arithmetic number, because the mean of its divisors is an integer number (55360303371360).

Almost surely, 2^{221411640666323} is an apocalyptic number.

221411640666323 is a deficient number, since it is larger than the sum of its proper divisors (29572819117).

221411640666323 is an equidigital number, since it uses as much as digits as its factorization.

221411640666323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29572819116.

The product of its (nonzero) digits is 1492992, while the sum is 47.

The spelling of 221411640666323 in words is "two hundred twenty-one trillion, four hundred eleven billion, six hundred forty million, six hundred sixty-six thousand, three hundred twenty-three".