221665127401101 has 8 divisors (see below), whose sum is σ = 295553586164704. Its totient is φ = 147776710119120.

The previous prime is 221665127401073. The next prime is 221665127401163. The reversal of 221665127401101 is 101104721566122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221665127401101 - 2²² = 221665123206797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221665127401101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221665127401181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5620911 + ... + 21792771.

It is an arithmetic number, because the mean of its divisors is an integer number (36944198270588).

Almost surely, 2^{221665127401101} is an apocalyptic number.

It is an amenable number.

221665127401101 is a deficient number, since it is larger than the sum of its proper divisors (73888458763603).

221665127401101 is a wasteful number, since it uses less digits than its factorization.

221665127401101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20740811.

The product of its (nonzero) digits is 40320, while the sum is 39.

Adding to 221665127401101 its reverse (101104721566122), we get a palindrome (322769848967223).

The spelling of 221665127401101 in words is "two hundred twenty-one trillion, six hundred sixty-five billion, one hundred twenty-seven million, four hundred one thousand, one hundred one".