11303231220 has 36 divisors (see below), whose sum is σ = 34286468580. Its totient is φ = 3014194944.

The previous prime is 11303231183. The next prime is 11303231239. The reversal of 11303231220 is 2213230311.

It can be written as a sum of positive squares in 2 ways, for example, as 2852841744 + 8450389476 = 53412^2 + 91926^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11303231193 and 11303231202.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 31397685 + ... + 31398044.

It is an arithmetic number, because the mean of its divisors is an integer number (952401905).

Almost surely, 2^11303231220 is an apocalyptic number.

11303231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11303231220 is an abundant number, since it is smaller than the sum of its proper divisors (22983237360).

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

11303231220 is a wasteful number, since it uses less digits than its factorization.

11303231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62795744 (or 62795739 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 11303231220 its reverse (2213230311), we get a palindrome (13516461531).

Subtracting from 11303231220 its reverse (2213230311), we obtain a palindrome (9090000909).

The spelling of 11303231220 in words is "eleven billion, three hundred three million, two hundred thirty-one thousand, two hundred twenty".