221011010 has 16 divisors (see below), whose sum is σ = 433985472. Its totient is φ = 80367600.

The previous prime is 221010971. The next prime is 221011057. The reversal of 221011010 is 10110122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004486 + ... + 1004705.

It is an arithmetic number, because the mean of its divisors is an integer number (27124092).

Almost surely, 2^221011010 is an apocalyptic number.

221011010 is a deficient number, since it is larger than the sum of its proper divisors (212974462).

221011010 is a wasteful number, since it uses less digits than its factorization.

221011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009209.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 221011010 is about 14866.4390490796. The cubic root of 221011010 is about 604.6043995309.

Adding to 221011010 its reverse (10110122), we get a palindrome (231121132).

It can be divided in two parts, 2 and 21011010, that added together give a palindrome (21011012).

The spelling of 221011010 in words is "two hundred twenty-one million, eleven thousand, ten".