12121233113131 has 4 divisors (see below), whose sum is σ = 12159959097832. Its totient is φ = 12082507128432.

The previous prime is 12121233113123. The next prime is 12121233113147. The reversal of 12121233113131 is 13131133212121.

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

It is a cyclic number.

It is not a de Polignac number, because 12121233113131 - 2³ = 12121233113123 is a prime.

It is a super-2 number, since 2×12121233113131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121233113096 and 12121233113105.

It is not an unprimeable number, because it can be changed into a prime (12121233113111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19362991881 + ... + 19362992506.

It is an arithmetic number, because the mean of its divisors is an integer number (3039989774458).

Almost surely, 2^{12121233113131} is an apocalyptic number.

12121233113131 is a deficient number, since it is larger than the sum of its proper divisors (38725984701).

12121233113131 is an equidigital number, since it uses as much as digits as its factorization.

12121233113131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38725984700.

The product of its digits is 648, while the sum is 25.

Adding to 12121233113131 its reverse (13131133212121), we get a palindrome (25252366325252).

The spelling of 12121233113131 in words is "twelve trillion, one hundred twenty-one billion, two hundred thirty-three million, one hundred thirteen thousand, one hundred thirty-one".