11001231131220 has 96 divisors (see below), whose sum is σ = 37337511738240. Its totient is φ = 2666965121280.

The previous prime is 11001231131213. The next prime is 11001231131249. The reversal of 11001231131220 is 2213113210011.

11001231131220 is a `hidden beast` number, since 1 + 10 + 0 + 12 + 311 + 312 + 20 = 666.

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 = 11001231131193 and 11001231131202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 926023617 + ... + 926035496.

It is an arithmetic number, because the mean of its divisors is an integer number (388932413940).

Almost surely, 2^{11001231131220} is an apocalyptic number.

11001231131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11001231131220 is an abundant number, since it is smaller than the sum of its proper divisors (26336280607020).

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

11001231131220 is a wasteful number, since it uses less digits than its factorization.

11001231131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852059142 (or 1852059134 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 11001231131220 its reverse (2213113210011), we get a palindrome (13214344341231).

The spelling of 11001231131220 in words is "eleven trillion, one billion, two hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty".