13112112121 has 8 divisors (see below), whose sum is σ = 13887859104. Its totient is φ = 12336859200.

The previous prime is 13112112103. The next prime is 13112112127. The reversal of 13112112121 is 12121121131.

It is a happy number.

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

It is not a de Polignac number, because 13112112121 - 2¹¹ = 13112110073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13112112095 and 13112112104.

It is not an unprimeable number, because it can be changed into a prime (13112112127) 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, 68155 + ... + 175696.

It is an arithmetic number, because the mean of its divisors is an integer number (1735982388).

Almost surely, 2^13112112121 is an apocalyptic number.

It is an amenable number.

13112112121 is a deficient number, since it is larger than the sum of its proper divisors (775746983).

13112112121 is a wasteful number, since it uses less digits than its factorization.

13112112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247031.

The product of its digits is 24, while the sum is 16.

Adding to 13112112121 its reverse (12121121131), we get a palindrome (25233233252).

The spelling of 13112112121 in words is "thirteen billion, one hundred twelve million, one hundred twelve thousand, one hundred twenty-one".