12111442040 has 16 divisors (see below), whose sum is σ = 27250744680. Its totient is φ = 4844576800.

The previous prime is 12111442009. The next prime is 12111442043. The reversal of 12111442040 is 4024411121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111442043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151392986 + ... + 151393065.

Almost surely, 2^12111442040 is an apocalyptic number.

12111442040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111442040 is an abundant number, since it is smaller than the sum of its proper divisors (15139302640).

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

12111442040 is a wasteful number, since it uses less digits than its factorization.

12111442040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302786062 (or 302786058 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12111442040 its reverse (4024411121), we get a palindrome (16135853161).

The spelling of 12111442040 in words is "twelve billion, one hundred eleven million, four hundred forty-two thousand, forty".