221043145551105 has 16 divisors (see below), whose sum is σ = 353669363619264. Its totient is φ = 117889567381440.

The previous prime is 221043145551101. The next prime is 221043145551127. The reversal of 221043145551105 is 501155541340122.

It is not a de Polignac number, because 221043145551105 - 2² = 221043145551101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221043145551101) 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, 11219790 + ... + 23832120.

It is an arithmetic number, because the mean of its divisors is an integer number (22104335226204).

Almost surely, 2^{221043145551105} is an apocalyptic number.

It is an amenable number.

221043145551105 is a deficient number, since it is larger than the sum of its proper divisors (132626218068159).

221043145551105 is a wasteful number, since it uses less digits than its factorization.

221043145551105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13780736.

The product of its (nonzero) digits is 120000, while the sum is 39.

Adding to 221043145551105 its reverse (501155541340122), we get a palindrome (722198686891227).

The spelling of 221043145551105 in words is "two hundred twenty-one trillion, forty-three billion, one hundred forty-five million, five hundred fifty-one thousand, one hundred five".