1121232143 has 4 divisors (see below), whose sum is σ = 1134741048. Its totient is φ = 1107723240.

The previous prime is 1121232131. The next prime is 1121232157. The reversal of 1121232143 is 3412321211.

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 1121232143 - 2¹⁴ = 1121215759 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 (1121232163) 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, 6754328 + ... + 6754493.

It is an arithmetic number, because the mean of its divisors is an integer number (283685262).

Almost surely, 2^1121232143 is an apocalyptic number.

1121232143 is a deficient number, since it is larger than the sum of its proper divisors (13508905).

1121232143 is an equidigital number, since it uses as much as digits as its factorization.

1121232143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13508904.

The product of its digits is 288, while the sum is 20.

The square root of 1121232143 is about 33484.8046582327. The cubic root of 1121232143 is about 1038.8795079015.

Adding to 1121232143 its reverse (3412321211), we get a palindrome (4533553354).

The spelling of 1121232143 in words is "one billion, one hundred twenty-one million, two hundred thirty-two thousand, one hundred forty-three".