12011343140 has 24 divisors (see below), whose sum is σ = 25238532480. Its totient is φ = 4801735008.

The previous prime is 12011343139. The next prime is 12011343143. The reversal of 12011343140 is 4134311021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (12011343143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139820 + ... + 208739.

It is an arithmetic number, because the mean of its divisors is an integer number (1051605520).

Almost surely, 2^12011343140 is an apocalyptic number.

12011343140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011343140 is an abundant number, since it is smaller than the sum of its proper divisors (13227189340).

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

12011343140 is a wasteful number, since it uses less digits than its factorization.

12011343140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350291 (or 350289 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12011343140 its reverse (4134311021), we get a palindrome (16145654161).

The spelling of 12011343140 in words is "twelve billion, eleven million, three hundred forty-three thousand, one hundred forty".