1111042042012 has 144 divisors (see below), whose sum is σ = 2522240259840. Its totient is φ = 424330679808.

The previous prime is 1111042041971. The next prime is 1111042042021. The reversal of 1111042042012 is 2102402401111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153391663 + ... + 153398905.

It is an arithmetic number, because the mean of its divisors is an integer number (17515557360).

Almost surely, 2^{1111042042012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111042042012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1261120129920).

1111042042012 is an abundant number, since it is smaller than the sum of its proper divisors (1411198217828).

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

1111042042012 is a wasteful number, since it uses less digits than its factorization.

1111042042012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9720 (or 9711 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1111042042012 its reverse (2102402401111), we get a palindrome (3213444443123).

The spelling of 1111042042012 in words is "one trillion, one hundred eleven billion, forty-two million, forty-two thousand, twelve".