1111131252 has 216 divisors, whose sum is σ = 3595711392. Its totient is φ = 286070400.

The previous prime is 1111131211. The next prime is 1111131253. The reversal of 1111131252 is 2521311111.

It is a super-2 number, since 2×1111131252² = 2469225318342175008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111131253) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3356727 + ... + 3357057.

It is an arithmetic number, because the mean of its divisors is an integer number (16646812).

Almost surely, 2^1111131252 is an apocalyptic number.

1111131252 is a gapful number since it is divisible by the number (12) 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 1111131252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1797855696).

1111131252 is an abundant number, since it is smaller than the sum of its proper divisors (2484580140).

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

1111131252 is a wasteful number, since it uses less digits than its factorization.

1111131252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 527 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 1111131252 is about 33333.6354452976. The cubic root of 1111131252 is about 1035.7504268559.

Adding to 1111131252 its reverse (2521311111), we get a palindrome (3632442363).

The spelling of 1111131252 in words is "one billion, one hundred eleven million, one hundred thirty-one thousand, two hundred fifty-two".