221102122112210 has 16 divisors (see below), whose sum is σ = 398646022507992. Its totient is φ = 88293692688000.

The previous prime is 221102122112159. The next prime is 221102122112227. The reversal of 221102122112210 is 12211221201122.

It can be written as a sum of positive squares in 4 ways, for example, as 168226580907961 + 52875541204249 = 12970219^2 + 7271557^2 .

It is a super-2 number, since 2×221102122112210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18394513301 + ... + 18394525320.

Almost surely, 2^{221102122112210} is an apocalyptic number.

221102122112210 is a deficient number, since it is larger than the sum of its proper divisors (177543900395782).

221102122112210 is a wasteful number, since it uses less digits than its factorization.

221102122112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36789039229.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221102122112210 its reverse (12211221201122), we get a palindrome (233313343313332).

The spelling of 221102122112210 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred twenty-two million, one hundred twelve thousand, two hundred ten".