13123053242221 has 4 divisors (see below), whose sum is σ = 14132518876252. Its totient is φ = 12113587608192.

The previous prime is 13123053242153. The next prime is 13123053242263. The reversal of 13123053242221 is 12224235032131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1637657684100 + 11485395558121 = 1279710^2 + 3389011^2 .

It is a cyclic number.

It is not a de Polignac number, because 13123053242221 - 2⁷ = 13123053242093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123053242281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504732816996 + ... + 504732817021.

It is an arithmetic number, because the mean of its divisors is an integer number (3533129719063).

Almost surely, 2^{13123053242221} is an apocalyptic number.

It is an amenable number.

13123053242221 is a deficient number, since it is larger than the sum of its proper divisors (1009465634031).

13123053242221 is a wasteful number, since it uses less digits than its factorization.

13123053242221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009465634030.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 13123053242221 its reverse (12224235032131), we get a palindrome (25347288274352).

The spelling of 13123053242221 in words is "thirteen trillion, one hundred twenty-three billion, fifty-three million, two hundred forty-two thousand, two hundred twenty-one".