1131200213220 has 144 divisors (see below), whose sum is σ = 4277993586048. Its totient is φ = 235054586880.

The previous prime is 1131200213219. The next prime is 1131200213243. The reversal of 1131200213220 is 223120021311.

1131200213220 is a `hidden beast` number, since 1 + 1 + 31 + 200 + 213 + 220 = 666.

It is a super-2 number, since 2×1131200213220² (a number of 25 digits) contains 22 as substring.

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 = 1131200213193 and 1131200213202.

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, 40794229 + ... + 40821948.

It is an arithmetic number, because the mean of its divisors is an integer number (29708288792).

Almost surely, 2^{1131200213220} is an apocalyptic number.

1131200213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131200213220 is an abundant number, since it is smaller than the sum of its proper divisors (3146793372828).

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

1131200213220 is a wasteful number, since it uses less digits than its factorization.

1131200213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81616210 (or 81616205 counting only the distinct ones).

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

Adding to 1131200213220 its reverse (223120021311), we get a palindrome (1354320234531).

The spelling of 1131200213220 in words is "one trillion, one hundred thirty-one billion, two hundred million, two hundred thirteen thousand, two hundred twenty".