221210404017 has 16 divisors (see below), whose sum is σ = 310490928960. Its totient is φ = 139702750272.

The previous prime is 221210403989. The next prime is 221210404031. The reversal of 221210404017 is 710404012122.

It is not a de Polignac number, because 221210404017 - 2⁷ = 221210403889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221210404057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 819883 + ... + 1055759.

It is an arithmetic number, because the mean of its divisors is an integer number (19405683060).

Almost surely, 2^221210404017 is an apocalyptic number.

It is an amenable number.

221210404017 is a deficient number, since it is larger than the sum of its proper divisors (89280524943).

221210404017 is a wasteful number, since it uses less digits than its factorization.

221210404017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252352.

The product of its (nonzero) digits is 896, while the sum is 24.

Adding to 221210404017 its reverse (710404012122), we get a palindrome (931614416139).

The spelling of 221210404017 in words is "two hundred twenty-one billion, two hundred ten million, four hundred four thousand, seventeen".