11011111121142 has 24 divisors (see below), whose sum is σ = 26026262650440. Its totient is φ = 3336700339680.

The previous prime is 11011111121141. The next prime is 11011111121161. The reversal of 11011111121142 is 24112111111011.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011111121141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27805835967 + ... + 27805836362.

It is an arithmetic number, because the mean of its divisors is an integer number (1084427610435).

Almost surely, 2^{11011111121142} is an apocalyptic number.

11011111121142 is an abundant number, since it is smaller than the sum of its proper divisors (15015151529298).

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

11011111121142 is a wasteful number, since it uses less digits than its factorization.

11011111121142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55611672348 (or 55611672345 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 11011111121142 its reverse (24112111111011), we get a palindrome (35123222232153).

The spelling of 11011111121142 in words is "eleven trillion, eleven billion, one hundred eleven million, one hundred twenty-one thousand, one hundred forty-two".