220001103231 has 128 divisors (see below), whose sum is σ = 384899020800. Its totient is φ = 108637562880.

The previous prime is 220001103191. The next prime is 220001103251. The reversal of 220001103231 is 132301100022.

It is not a de Polignac number, because 220001103231 - 2⁶ = 220001103167 is a prime.

It is a super-2 number, since 2×220001103231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220001103231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001103251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 96958365 + ... + 96960633.

It is an arithmetic number, because the mean of its divisors is an integer number (3007023600).

Almost surely, 2^220001103231 is an apocalyptic number.

220001103231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

220001103231 is a deficient number, since it is larger than the sum of its proper divisors (164897917569).

220001103231 is a wasteful number, since it uses less digits than its factorization.

220001103231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 220001103231 its reverse (132301100022), we get a palindrome (352302203253).

The spelling of 220001103231 in words is "two hundred twenty billion, one million, one hundred three thousand, two hundred thirty-one".