11111132412 has 72 divisors (see below), whose sum is σ = 29131519872. Its totient is φ = 3567888000.

The previous prime is 11111132411. The next prime is 11111132419. The reversal of 11111132412 is 21423111111.

11111132412 is a `hidden beast` number, since 11 + 111 + 132 + 412 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111132411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93237 + ... + 175827.

Almost surely, 2^11111132412 is an apocalyptic number.

11111132412 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 11111132412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14565759936).

11111132412 is an abundant number, since it is smaller than the sum of its proper divisors (18020387460).

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

11111132412 is a wasteful number, since it uses less digits than its factorization.

11111132412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82739 (or 82734 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 11111132412 its reverse (21423111111), we get a palindrome (32534243523).

The spelling of 11111132412 in words is "eleven billion, one hundred eleven million, one hundred thirty-two thousand, four hundred twelve".