13120121123 has 2 divisors, whose sum is σ = 13120121124. Its totient is φ = 13120121122.

The previous prime is 13120121107. The next prime is 13120121141. The reversal of 13120121123 is 32112102131.

It is a weak prime.

It is an emirp because it is prime and its reverse (32112102131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13120121123 - 2⁴ = 13120121107 is a prime.

It is a super-2 number, since 2×13120121123² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13120121423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560060561 + 6560060562.

It is an arithmetic number, because the mean of its divisors is an integer number (6560060562).

Almost surely, 2^13120121123 is an apocalyptic number.

13120121123 is a deficient number, since it is larger than the sum of its proper divisors (1).

13120121123 is an equidigital number, since it uses as much as digits as its factorization.

13120121123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13120121123 its reverse (32112102131), we get a palindrome (45232223254).

The spelling of 13120121123 in words is "thirteen billion, one hundred twenty million, one hundred twenty-one thousand, one hundred twenty-three".