421111488665 has 16 divisors (see below), whose sum is σ = 583131364608. Its totient is φ = 285958645056.

The previous prime is 421111488661. The next prime is 421111488683. The reversal of 421111488665 is 566884111124.

It is not a de Polignac number, because 421111488665 - 2² = 421111488661 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421111488661) 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, 58402982 + ... + 58410191.

It is an arithmetic number, because the mean of its divisors is an integer number (36445710288).

Almost surely, 2^421111488665 is an apocalyptic number.

It is an amenable number.

421111488665 is a deficient number, since it is larger than the sum of its proper divisors (162019875943).

421111488665 is a wasteful number, since it uses less digits than its factorization.

421111488665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116813288.

The product of its digits is 368640, while the sum is 47.

Adding to 421111488665 its reverse (566884111124), we get a palindrome (987995599789).

The spelling of 421111488665 in words is "four hundred twenty-one billion, one hundred eleven million, four hundred eighty-eight thousand, six hundred sixty-five".