11111121042 has 16 divisors (see below), whose sum is σ = 25396848192. Its totient is φ = 3174606000.

The previous prime is 11111121041. The next prime is 11111121121. The reversal of 11111121042 is 24012111111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11111121041) 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, 132275209 + ... + 132275292.

It is an arithmetic number, because the mean of its divisors is an integer number (1587303012).

Almost surely, 2^11111121042 is an apocalyptic number.

11111121042 is an abundant number, since it is smaller than the sum of its proper divisors (14285727150).

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

11111121042 is a wasteful number, since it uses less digits than its factorization.

11111121042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264550513.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11111121042 its reverse (24012111111), we get a palindrome (35123232153).

The spelling of 11111121042 in words is "eleven billion, one hundred eleven million, one hundred twenty-one thousand, forty-two".