1321123123123 has 24 divisors (see below), whose sum is σ = 1373643667968. Its totient is φ = 1270311345072.

The previous prime is 1321123123081. The next prime is 1321123123129. The reversal of 1321123123123 is 3213213211231.

It is not a de Polignac number, because 1321123123123 - 2²¹ = 1321121025971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321123123129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 283318090 + ... + 283322752.

It is an arithmetic number, because the mean of its divisors is an integer number (57235152832).

Almost surely, 2^{1321123123123} is an apocalyptic number.

1321123123123 is a deficient number, since it is larger than the sum of its proper divisors (52520544845).

1321123123123 is an equidigital number, since it uses as much as digits as its factorization.

1321123123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7103 (or 7060 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

Adding to 1321123123123 its reverse (3213213211231), we get a palindrome (4534336334354).

The spelling of 1321123123123 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-three million, one hundred twenty-three thousand, one hundred twenty-three".