11012131840 has 88 divisors (see below), whose sum is σ = 26664418512. Its totient is φ = 4363468800.

The previous prime is 11012131799. The next prime is 11012131841. The reversal of 11012131840 is 4813121011.

It is not an unprimeable number, because it can be changed into a prime (11012131841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537790 + ... + 557890.

Almost surely, 2^11012131840 is an apocalyptic number.

11012131840 is a gapful number since it is divisible by the number (10) 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 11012131840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13332209256).

11012131840 is an abundant number, since it is smaller than the sum of its proper divisors (15652286672).

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

11012131840 is a wasteful number, since it uses less digits than its factorization.

11012131840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20233 (or 20215 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 11012131840 its reverse (4813121011), we get a palindrome (15825252851).

The spelling of 11012131840 in words is "eleven billion, twelve million, one hundred thirty-one thousand, eight hundred forty".