491122222001 has 8 divisors (see below), whose sum is σ = 512691016704. Its totient is φ = 469571398560.

The previous prime is 491122221971. The next prime is 491122222009. The reversal of 491122222001 is 100222221194.

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 491122222001 - 2⁶ = 491122221937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491122222009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4436945 + ... + 4546286.

It is an arithmetic number, because the mean of its divisors is an integer number (64086377088).

Almost surely, 2^491122222001 is an apocalyptic number.

It is an amenable number.

491122222001 is a deficient number, since it is larger than the sum of its proper divisors (21568794703).

491122222001 is a wasteful number, since it uses less digits than its factorization.

491122222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8985631.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 491122222001 its reverse (100222221194), we get a palindrome (591344443195).

The spelling of 491122222001 in words is "four hundred ninety-one billion, one hundred twenty-two million, two hundred twenty-two thousand, one".