11203231001220 has 144 divisors (see below), whose sum is σ = 35247159602928. Its totient is φ = 2878004044800.

The previous prime is 11203231001203. The next prime is 11203231001267. The reversal of 11203231001220 is 2210013230211.

11203231001220 is a `hidden beast` number, since 1 + 1 + 20 + 323 + 100 + 1 + 220 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1782112861764 + 9421118139456 = 1334958^2 + 3069384^2 .

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 = 11203231001193 and 11203231001202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7654899 + ... + 9000218.

It is an arithmetic number, because the mean of its divisors is an integer number (244771941687).

Almost surely, 2^{11203231001220} is an apocalyptic number.

11203231001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11203231001220 is an abundant number, since it is smaller than the sum of its proper divisors (24043928601708).

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

11203231001220 is a wasteful number, since it uses less digits than its factorization.

11203231001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16655270 (or 16655265 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11203231001220 its reverse (2210013230211), we get a palindrome (13413244231431).

The spelling of 11203231001220 in words is "eleven trillion, two hundred three billion, two hundred thirty-one million, one thousand, two hundred twenty".