1142111311 has 4 divisors (see below), whose sum is σ = 1245939624. Its totient is φ = 1038283000.

The previous prime is 1142111309. The next prime is 1142111339. The reversal of 1142111311 is 1131112411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1142111311 - 2¹ = 1142111309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142111351) 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, 51914140 + ... + 51914161.

It is an arithmetic number, because the mean of its divisors is an integer number (311484906).

Almost surely, 2^1142111311 is an apocalyptic number.

1142111311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1142111311 is a deficient number, since it is larger than the sum of its proper divisors (103828313).

1142111311 is a wasteful number, since it uses less digits than its factorization.

1142111311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103828312.

The product of its digits is 24, while the sum is 16.

The square root of 1142111311 is about 33795.1373869082. The cubic root of 1142111311 is about 1045.2884320920.

Adding to 1142111311 its reverse (1131112411), we get a palindrome (2273223722).

The spelling of 1142111311 in words is "one billion, one hundred forty-two million, one hundred eleven thousand, three hundred eleven".