13121021112121 has 8 divisors (see below), whose sum is σ = 14231987483840. Its totient is φ = 12024577176912.

The previous prime is 13121021112077. The next prime is 13121021112131. The reversal of 13121021112121 is 12121112012131.

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 13121021112121 - 2⁹ = 13121021111609 is a prime.

It is a super-2 number, since 2×13121021112121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121021112131) 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, 3630607245 + ... + 3630610858.

It is an arithmetic number, because the mean of its divisors is an integer number (1778998435480).

Almost surely, 2^{13121021112121} is an apocalyptic number.

It is an amenable number.

13121021112121 is a deficient number, since it is larger than the sum of its proper divisors (1110966371719).

13121021112121 is a wasteful number, since it uses less digits than its factorization.

13121021112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7261218255.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 13121021112121 its reverse (12121112012131), we get a palindrome (25242133124252).

The spelling of 13121021112121 in words is "thirteen trillion, one hundred twenty-one billion, twenty-one million, one hundred twelve thousand, one hundred twenty-one".