1131203030220 has 144 divisors (see below), whose sum is σ = 3441594985920. Its totient is φ = 300751331328.

The previous prime is 1131203030219. The next prime is 1131203030249. The reversal of 1131203030220 is 220303021311.

1131203030220 is a `hidden beast` number, since 1 + 1 + 312 + 0 + 30 + 302 + 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 = 1131203030193 and 1131203030202.

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 47 ways as a sum of consecutive naturals, for example, 195605449 + ... + 195611231.

It is an arithmetic number, because the mean of its divisors is an integer number (23899965180).

Almost surely, 2^{1131203030220} is an apocalyptic number.

1131203030220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131203030220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720797492960).

1131203030220 is an abundant number, since it is smaller than the sum of its proper divisors (2310391955700).

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

1131203030220 is a wasteful number, since it uses less digits than its factorization.

1131203030220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8864 (or 8859 counting only the distinct ones).

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

Adding to 1131203030220 its reverse (220303021311), we get a palindrome (1351506051531).

The spelling of 1131203030220 in words is "one trillion, one hundred thirty-one billion, two hundred three million, thirty thousand, two hundred twenty".