11512031100012 has 72 divisors (see below), whose sum is σ = 29902353136656. Its totient is φ = 3731631099264.

The previous prime is 11512031100001. The next prime is 11512031100103. The reversal of 11512031100012 is 21000113021511.

11512031100012 is a `hidden beast` number, since 11 + 512 + 0 + 31 + 100 + 0 + 12 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172258 + ... + 4801430.

Almost surely, 2^{11512031100012} is an apocalyptic number.

11512031100012 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 11512031100012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14951176568328).

11512031100012 is an abundant number, since it is smaller than the sum of its proper divisors (18390322036644).

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

11512031100012 is a wasteful number, since it uses less digits than its factorization.

11512031100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4631087 (or 4631082 counting only the distinct ones).

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

Adding to 11512031100012 its reverse (21000113021511), we get a palindrome (32512144121523).

The spelling of 11512031100012 in words is "eleven trillion, five hundred twelve billion, thirty-one million, one hundred thousand, twelve".