13121331200121 has 8 divisors (see below), whose sum is σ = 18059466598144. Its totient is φ = 8465374967760.

The previous prime is 13121331200101. The next prime is 13121331200123. The reversal of 13121331200121 is 12100213312131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13121331200121 - 2¹⁸ = 13121330937977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121331200123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70544791306 + ... + 70544791491.

It is an arithmetic number, because the mean of its divisors is an integer number (2257433324768).

Almost surely, 2^{13121331200121} is an apocalyptic number.

It is an amenable number.

13121331200121 is a deficient number, since it is larger than the sum of its proper divisors (4938135398023).

13121331200121 is a wasteful number, since it uses less digits than its factorization.

13121331200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141089582831.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 13121331200121 its reverse (12100213312131), we get a palindrome (25221544512252).

The spelling of 13121331200121 in words is "thirteen trillion, one hundred twenty-one billion, three hundred thirty-one million, two hundred thousand, one hundred twenty-one".