1142321111 has 2 divisors, whose sum is σ = 1142321112. Its totient is φ = 1142321110.

The previous prime is 1142321099. The next prime is 1142321113. The reversal of 1142321111 is 1111232411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1142321111 - 2²² = 1138126807 is a prime.

Together with 1142321113, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1142321111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142321113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571160555 + 571160556.

It is an arithmetic number, because the mean of its divisors is an integer number (571160556).

Almost surely, 2^1142321111 is an apocalyptic number.

1142321111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142321111 is an equidigital number, since it uses as much as digits as its factorization.

1142321111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 17.

The square root of 1142321111 is about 33798.2412412244. The cubic root of 1142321111 is about 1045.3524328842.

Adding to 1142321111 its reverse (1111232411), we get a palindrome (2253553522).

The spelling of 1142321111 in words is "one billion, one hundred forty-two million, three hundred twenty-one thousand, one hundred eleven".