221441101656765 has 16 divisors (see below), whose sum is σ = 354960671652096. Its totient is φ = 117883617883200.

The previous prime is 221441101656737. The next prime is 221441101656767. The reversal of 221441101656765 is 567656101144122.

It is not a de Polignac number, because 221441101656765 - 2¹² = 221441101652669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221441101656767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13643929141 + ... + 13643945370.

It is an arithmetic number, because the mean of its divisors is an integer number (22185041978256).

Almost surely, 2^{221441101656765} is an apocalyptic number.

It is an amenable number.

221441101656765 is a deficient number, since it is larger than the sum of its proper divisors (133519569995331).

221441101656765 is a wasteful number, since it uses less digits than its factorization.

221441101656765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27287875060.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 221441101656765 in words is "two hundred twenty-one trillion, four hundred forty-one billion, one hundred one million, six hundred fifty-six thousand, seven hundred sixty-five".