1111230131220 has 144 divisors (see below), whose sum is σ = 3870696473280. Its totient is φ = 255210739200.

The previous prime is 1111230131183. The next prime is 1111230131233. The reversal of 1111230131220 is 221310321111.

1111230131220 is a `hidden beast` number, since 1 + 1 + 112 + 301 + 31 + 220 = 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 = 1111230131193 and 1111230131202.

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 47 ways as a sum of consecutive naturals, for example, 14731521 + ... + 14806760.

It is an arithmetic number, because the mean of its divisors is an integer number (26879836620).

Almost surely, 2^{1111230131220} is an apocalyptic number.

1111230131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111230131220 is an abundant number, since it is smaller than the sum of its proper divisors (2759466342060).

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

1111230131220 is a wasteful number, since it uses less digits than its factorization.

1111230131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29538326 (or 29538321 counting only the distinct ones).

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

Adding to 1111230131220 its reverse (221310321111), we get a palindrome (1332540452331).

The spelling of 1111230131220 in words is "one trillion, one hundred eleven billion, two hundred thirty million, one hundred thirty-one thousand, two hundred twenty".