13121010121 has 8 divisors (see below), whose sum is σ = 13573663488. Its totient is φ = 12670194000.

The previous prime is 13121010109. The next prime is 13121010127. The reversal of 13121010121 is 12101012131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13121010121 - 2⁹ = 13121009609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121010127) 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, 444775 + ... + 473356.

It is an arithmetic number, because the mean of its divisors is an integer number (1696707936).

Almost surely, 2^13121010121 is an apocalyptic number.

It is an amenable number.

13121010121 is a deficient number, since it is larger than the sum of its proper divisors (452653367).

13121010121 is an equidigital number, since it uses as much as digits as its factorization.

13121010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918623.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 13121010121 its reverse (12101012131), we get a palindrome (25222022252).

The spelling of 13121010121 in words is "thirteen billion, one hundred twenty-one million, ten thousand, one hundred twenty-one".