11142043121 has 24 divisors (see below), whose sum is σ = 12372498432. Its totient is φ = 10025769600.

The previous prime is 11142043103. The next prime is 11142043123. The reversal of 11142043121 is 12134024111.

It is a de Polignac number, because none of the positive numbers 2^k-11142043121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11142043093 and 11142043102.

It is not an unprimeable number, because it can be changed into a prime (11142043123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12646601 + ... + 12647481.

It is an arithmetic number, because the mean of its divisors is an integer number (515520768).

Almost surely, 2^11142043121 is an apocalyptic number.

11142043121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11142043121 is a deficient number, since it is larger than the sum of its proper divisors (1230455311).

11142043121 is a wasteful number, since it uses less digits than its factorization.

11142043121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 11142043121 its reverse (12134024111), we get a palindrome (23276067232).

The spelling of 11142043121 in words is "eleven billion, one hundred forty-two million, forty-three thousand, one hundred twenty-one".