221412500217665 has 16 divisors (see below), whose sum is σ = 266031103464000. Its totient is φ = 176905951621440.

The previous prime is 221412500217647. The next prime is 221412500217691. The reversal of 221412500217665 is 566712005214122.

It is not a de Polignac number, because 221412500217665 - 2³⁸ = 221137622310721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86998982 + ... + 89507808.

It is an arithmetic number, because the mean of its divisors is an integer number (16626943966500).

Almost surely, 2^{221412500217665} is an apocalyptic number.

It is an amenable number.

221412500217665 is a deficient number, since it is larger than the sum of its proper divisors (44618603246335).

221412500217665 is a wasteful number, since it uses less digits than its factorization.

221412500217665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531152.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 221412500217665 in words is "two hundred twenty-one trillion, four hundred twelve billion, five hundred million, two hundred seventeen thousand, six hundred sixty-five".