221010111010 has 32 divisors (see below), whose sum is σ = 429024037680. Its totient is φ = 81488602368.

The previous prime is 221010110933. The next prime is 221010111079. The reversal of 221010111010 is 10111010122.

221010111010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 19190837961 + 201819273049 = 138531^2 + 449243^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1106757 + ... + 1291096.

Almost surely, 2^221010111010 is an apocalyptic number.

221010111010 is a deficient number, since it is larger than the sum of its proper divisors (208013926670).

221010111010 is a wasteful number, since it uses less digits than its factorization.

221010111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398582.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 221010111010 its reverse (10111010122), we get a palindrome (231121121132).

The spelling of 221010111010 in words is "two hundred twenty-one billion, ten million, one hundred eleven thousand, ten".