13042302121 has 4 divisors (see below), whose sum is σ = 13129834500. Its totient is φ = 12954769744.

The previous prime is 13042302109. The next prime is 13042302127. The reversal of 13042302121 is 12120324031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12120324031 = 1433 ⋅8458007.

It can be written as a sum of positive squares in 2 ways, for example, as 3401222400 + 9641079721 = 58320^2 + 98189^2 .

It is a cyclic number.

It is not a de Polignac number, because 13042302121 - 2¹⁵ = 13042269353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13042302127) 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, 43765966 + ... + 43766263.

It is an arithmetic number, because the mean of its divisors is an integer number (3282458625).

Almost surely, 2^13042302121 is an apocalyptic number.

It is an amenable number.

13042302121 is a deficient number, since it is larger than the sum of its proper divisors (87532379).

13042302121 is an equidigital number, since it uses as much as digits as its factorization.

13042302121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87532378.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13042302121 its reverse (12120324031), we get a palindrome (25162626152).

The spelling of 13042302121 in words is "thirteen billion, forty-two million, three hundred two thousand, one hundred twenty-one".