1121117543 has 32 divisors (see below), whose sum is σ = 1473432576. Its totient is φ = 828672768.

The previous prime is 1121117537. The next prime is 1121117549. The reversal of 1121117543 is 3457111211.

It is an interprime number because it is at equal distance from previous prime (1121117537) and next prime (1121117549).

It is not a de Polignac number, because 1121117543 - 2¹⁶ = 1121052007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121117549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83771 + ... + 96227.

It is an arithmetic number, because the mean of its divisors is an integer number (46044768).

Almost surely, 2^1121117543 is an apocalyptic number.

1121117543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1121117543 is a deficient number, since it is larger than the sum of its proper divisors (352315033).

1121117543 is a wasteful number, since it uses less digits than its factorization.

1121117543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12543.

The product of its digits is 840, while the sum is 26.

The square root of 1121117543 is about 33483.0933905456. The cubic root of 1121117543 is about 1038.8441124220.

Adding to 1121117543 its reverse (3457111211), we get a palindrome (4578228754).

The spelling of 1121117543 in words is "one billion, one hundred twenty-one million, one hundred seventeen thousand, five hundred forty-three".