13020342121 has 2 divisors, whose sum is σ = 13020342122. Its totient is φ = 13020342120.

The previous prime is 13020342119. The next prime is 13020342163. The reversal of 13020342121 is 12124302031.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10193931225 + 2826410896 = 100965^2 + 53164^2 .

It is a cyclic number.

It is not a de Polignac number, because 13020342121 - 2¹ = 13020342119 is a prime.

Together with 13020342119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13020342191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6510171060 + 6510171061.

It is an arithmetic number, because the mean of its divisors is an integer number (6510171061).

Almost surely, 2^13020342121 is an apocalyptic number.

It is an amenable number.

13020342121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13020342121 is an equidigital number, since it uses as much as digits as its factorization.

13020342121 is an evil number, because the sum of its binary digits is even.

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

Adding to 13020342121 its reverse (12124302031), we get a palindrome (25144644152).

The spelling of 13020342121 in words is "thirteen billion, twenty million, three hundred forty-two thousand, one hundred twenty-one".