1243020230243 has 4 divisors (see below), whose sum is σ = 1356022069368. Its totient is φ = 1130018391120.

The previous prime is 1243020230219. The next prime is 1243020230303. The reversal of 1243020230243 is 3420320203421.

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 1243020230243 - 2²⁶ = 1242953121379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243020230743) 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, 56500919546 + ... + 56500919567.

It is an arithmetic number, because the mean of its divisors is an integer number (339005517342).

Almost surely, 2^{1243020230243} is an apocalyptic number.

1243020230243 is a deficient number, since it is larger than the sum of its proper divisors (113001839125).

1243020230243 is a wasteful number, since it uses less digits than its factorization.

1243020230243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113001839124.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 1243020230243 its reverse (3420320203421), we get a palindrome (4663340433664).

The spelling of 1243020230243 in words is "one trillion, two hundred forty-three billion, twenty million, two hundred thirty thousand, two hundred forty-three".