221211101110 has 64 divisors (see below), whose sum is σ = 413210730240. Its totient is φ = 85204049920.

The previous prime is 221211101107. The next prime is 221211101117. The reversal of 221211101110 is 11101112122.

It is a happy number.

221211101110 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211101117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21633459 + ... + 21643681.

It is an arithmetic number, because the mean of its divisors is an integer number (6456417660).

Almost surely, 2^221211101110 is an apocalyptic number.

221211101110 is a deficient number, since it is larger than the sum of its proper divisors (191999629130).

221211101110 is a wasteful number, since it uses less digits than its factorization.

221211101110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10953.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221211101110 its reverse (11101112122), we get a palindrome (232312213232).

The spelling of 221211101110 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred one thousand, one hundred ten".