221222105515 has 16 divisors (see below), whose sum is σ = 268755870240. Its totient is φ = 174789331200.

The previous prime is 221222105477. The next prime is 221222105519. The reversal of 221222105515 is 515501222122.

It is not a de Polignac number, because 221222105515 - 2²¹ = 221220008363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221222105519) 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, 106840 + ... + 673690.

It is an arithmetic number, because the mean of its divisors is an integer number (16797241890).

Almost surely, 2^221222105515 is an apocalyptic number.

221222105515 is a deficient number, since it is larger than the sum of its proper divisors (47533764725).

221222105515 is an equidigital number, since it uses as much as digits as its factorization.

221222105515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567822.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 221222105515 its reverse (515501222122), we get a palindrome (736723327637).

The spelling of 221222105515 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred five thousand, five hundred fifteen".