1131224443220 has 24 divisors (see below), whose sum is σ = 2375957046624. Its totient is φ = 452416307616.

The previous prime is 1131224443147. The next prime is 1131224443231. The reversal of 1131224443220 is 223444221311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4465514 + ... + 4712033.

It is an arithmetic number, because the mean of its divisors is an integer number (98998210276).

Almost surely, 2^{1131224443220} is an apocalyptic number.

1131224443220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131224443220 is an abundant number, since it is smaller than the sum of its proper divisors (1244732603404).

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

1131224443220 is a wasteful number, since it uses less digits than its factorization.

1131224443220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9183719 (or 9183717 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 1131224443220 its reverse (223444221311), we get a palindrome (1354668664531).

The spelling of 1131224443220 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-four million, four hundred forty-three thousand, two hundred twenty".