1020120442243 has 4 divisors (see below), whose sum is σ = 1165851934000. Its totient is φ = 874388950488.

The previous prime is 1020120442199. The next prime is 1020120442247. The reversal of 1020120442243 is 3422440210201.

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 1020120442243 - 2¹³ = 1020120434051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020120442247) 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, 72865745868 + ... + 72865745881.

It is an arithmetic number, because the mean of its divisors is an integer number (291462983500).

Almost surely, 2^{1020120442243} is an apocalyptic number.

1020120442243 is a deficient number, since it is larger than the sum of its proper divisors (145731491757).

1020120442243 is an equidigital number, since it uses as much as digits as its factorization.

1020120442243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145731491756.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 1020120442243 its reverse (3422440210201), we get a palindrome (4442560652444).

The spelling of 1020120442243 in words is "one trillion, twenty billion, one hundred twenty million, four hundred forty-two thousand, two hundred forty-three".