1111020143 has 4 divisors (see below), whose sum is σ = 1111483368. Its totient is φ = 1110556920.

The previous prime is 1111020121. The next prime is 1111020149. The reversal of 1111020143 is 3410201111.

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 1111020143 - 2¹² = 1111016047 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 (1111020149) 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, 227996 + ... + 232817.

It is an arithmetic number, because the mean of its divisors is an integer number (277870842).

Almost surely, 2^1111020143 is an apocalyptic number.

1111020143 is a deficient number, since it is larger than the sum of its proper divisors (463225).

1111020143 is an equidigital number, since it uses as much as digits as its factorization.

1111020143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463224.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1111020143 is about 33331.9687837367. The cubic root of 1111020143 is about 1035.7159019727.

Adding to 1111020143 its reverse (3410201111), we get a palindrome (4521221254).

The spelling of 1111020143 in words is "one billion, one hundred eleven million, twenty thousand, one hundred forty-three".