1020111443 has 4 divisors (see below), whose sum is σ = 1098581568. Its totient is φ = 941641320.

The previous prime is 1020111419. The next prime is 1020111487. The reversal of 1020111443 is 3441110201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3441110201 = 23 ⋅149613487.

It is a cyclic number.

It is not a de Polignac number, because 1020111443 - 2⁸ = 1020111187 is a prime.

It is a super-2 number, since 2×1020111443² = 2081254712279084498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020111643) 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 in 3 ways as a sum of consecutive naturals, for example, 39235043 + ... + 39235068.

It is an arithmetic number, because the mean of its divisors is an integer number (274645392).

Almost surely, 2^1020111443 is an apocalyptic number.

1020111443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1020111443 is a deficient number, since it is larger than the sum of its proper divisors (78470125).

1020111443 is an equidigital number, since it uses as much as digits as its factorization.

1020111443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78470124.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1020111443 is about 31939.1835055313. The cubic root of 1020111443 is about 1006.6593687004.

Adding to 1020111443 its reverse (3441110201), we get a palindrome (4461221644).

The spelling of 1020111443 in words is "one billion, twenty million, one hundred eleven thousand, four hundred forty-three".