221085266501 has 32 divisors (see below), whose sum is σ = 248778044928. Its totient is φ = 194707506240.

The previous prime is 221085266477. The next prime is 221085266531. The reversal of 221085266501 is 105662580122.

It is a cyclic number.

It is not a de Polignac number, because 221085266501 - 2²² = 221081072197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221085266531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115932590 + ... + 115934496.

It is an arithmetic number, because the mean of its divisors is an integer number (7774313904).

Almost surely, 2^221085266501 is an apocalyptic number.

It is an amenable number.

221085266501 is a deficient number, since it is larger than the sum of its proper divisors (27692778427).

221085266501 is a wasteful number, since it uses less digits than its factorization.

221085266501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 221085266501 in words is "two hundred twenty-one billion, eighty-five million, two hundred sixty-six thousand, five hundred one".