221111110240 has 48 divisors (see below), whose sum is σ = 528668704368. Its totient is φ = 87378843136.

The previous prime is 221111110211. The next prime is 221111110289. The reversal of 221111110240 is 42011111122.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 8311687 + ... + 8338246.

It is an arithmetic number, because the mean of its divisors is an integer number (11013931341).

Almost surely, 2^221111110240 is an apocalyptic number.

221111110240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221111110240 is an abundant number, since it is smaller than the sum of its proper divisors (307557594128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221111110240 is a wasteful number, since it uses less digits than its factorization.

221111110240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16650031 (or 16650023 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221111110240 its reverse (42011111122), we get a palindrome (263122221362).

The spelling of 221111110240 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred ten thousand, two hundred forty".