1121403142443 has 16 divisors (see below), whose sum is σ = 1538120289056. Its totient is φ = 726209971200.

The previous prime is 1121403142439. The next prime is 1121403142451. The reversal of 1121403142443 is 3442413041211.

It is a happy number.

It is not a de Polignac number, because 1121403142443 - 2² = 1121403142439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121403142443.

It is not an unprimeable number, because it can be changed into a prime (1121403142493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8172358 + ... + 8308443.

It is an arithmetic number, because the mean of its divisors is an integer number (96132518066).

Almost surely, 2^{1121403142443} is an apocalyptic number.

1121403142443 is a deficient number, since it is larger than the sum of its proper divisors (416717146613).

1121403142443 is a wasteful number, since it uses less digits than its factorization.

1121403142443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16481454.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 1121403142443 its reverse (3442413041211), we get a palindrome (4563816183654).

The spelling of 1121403142443 in words is "one trillion, one hundred twenty-one billion, four hundred three million, one hundred forty-two thousand, four hundred forty-three".