1111220543 has 2 divisors, whose sum is σ = 1111220544. Its totient is φ = 1111220542.

The previous prime is 1111220507. The next prime is 1111220569. The reversal of 1111220543 is 3450221111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111220543 - 2¹⁰ = 1111219519 is a prime.

It is a super-2 number, since 2×1111220543² = 2469622190370429698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111223543) 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, 555610271 + 555610272.

It is an arithmetic number, because the mean of its divisors is an integer number (555610272).

Almost surely, 2^1111220543 is an apocalyptic number.

1111220543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111220543 is an equidigital number, since it uses as much as digits as its factorization.

1111220543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1111220543 is about 33334.9747712519. The cubic root of 1111220543 is about 1035.7781705673.

Adding to 1111220543 its reverse (3450221111), we get a palindrome (4561441654).

The spelling of 1111220543 in words is "one billion, one hundred eleven million, two hundred twenty thousand, five hundred forty-three".