221311110111010 has 32 divisors (see below), whose sum is σ = 402320640226032. Its totient is φ = 87644373196800.

The previous prime is 221311110110953. The next prime is 221311110111011. The reversal of 221311110111010 is 10111011113122.

It can be written as a sum of positive squares in 8 ways, for example, as 169703797215681 + 51607312895329 = 13027041^2 + 7183823^2 .

It is not an unprimeable number, because it can be changed into a prime (221311110111011) 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, 20240962 + ... + 29194498.

Almost surely, 2^{221311110111010} is an apocalyptic number.

221311110111010 is a deficient number, since it is larger than the sum of its proper divisors (181009530115022).

221311110111010 is a wasteful number, since it uses less digits than its factorization.

221311110111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8978118.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 221311110111010 its reverse (10111011113122), we get a palindrome (231422121224132).

The spelling of 221311110111010 in words is "two hundred twenty-one trillion, three hundred eleven billion, one hundred ten million, one hundred eleven thousand, ten".