1042321021243 has 4 divisors (see below), whose sum is σ = 1042332034840. Its totient is φ = 1042310007648.

The previous prime is 1042321021241. The next prime is 1042321021309. The reversal of 1042321021243 is 3421201232401.

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 1042321021243 - 2¹ = 1042321021241 is a prime.

It is a super-2 number, since 2×1042321021243² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042321021241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5363598 + ... + 5554531.

It is an arithmetic number, because the mean of its divisors is an integer number (260583008710).

Almost surely, 2^{1042321021243} is an apocalyptic number.

1042321021243 is a deficient number, since it is larger than the sum of its proper divisors (11013597).

1042321021243 is an equidigital number, since it uses as much as digits as its factorization.

1042321021243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11013596.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1042321021243 its reverse (3421201232401), we get a palindrome (4463522253644).

The spelling of 1042321021243 in words is "one trillion, forty-two billion, three hundred twenty-one million, twenty-one thousand, two hundred forty-three".