1321121030123 has 2 divisors, whose sum is σ = 1321121030124. Its totient is φ = 1321121030122.

The previous prime is 1321121030111. The next prime is 1321121030213. The reversal of 1321121030123 is 3210301211231.

It is a happy number.

Together with next prime (1321121030213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321121030123 - 2⁶ = 1321121030059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321121030095 and 1321121030104.

It is not a weakly prime, because it can be changed into another prime (1321121030323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660560515061 + 660560515062.

It is an arithmetic number, because the mean of its divisors is an integer number (660560515062).

Almost surely, 2^{1321121030123} is an apocalyptic number.

1321121030123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321121030123 is an equidigital number, since it uses as much as digits as its factorization.

1321121030123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321121030123 its reverse (3210301211231), we get a palindrome (4531422241354).

The spelling of 1321121030123 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-one million, thirty thousand, one hundred twenty-three".