1131323121252 has 18 divisors (see below), whose sum is σ = 2859733445478. Its totient is φ = 377107707072.

The previous prime is 1131323121241. The next prime is 1131323121289. The reversal of 1131323121252 is 2521213231311.

1131323121252 is a `hidden beast` number, since 11 + 313 + 2 + 312 + 1 + 25 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 573860791296 + 557462329956 = 757536^2 + 746634^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 15712821093 + ... + 15712821164.

Almost surely, 2^{1131323121252} is an apocalyptic number.

1131323121252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1131323121252 is an abundant number, since it is smaller than the sum of its proper divisors (1728410324226).

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

1131323121252 is a wasteful number, since it uses less digits than its factorization.

1131323121252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31425642267 (or 31425642262 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

Adding to 1131323121252 its reverse (2521213231311), we get a palindrome (3652536352563).

The spelling of 1131323121252 in words is "one trillion, one hundred thirty-one billion, three hundred twenty-three million, one hundred twenty-one thousand, two hundred fifty-two".