12121333131 has 8 divisors (see below), whose sum is σ = 16162408080. Its totient is φ = 8080573472.

The previous prime is 12121333117. The next prime is 12121333151. The reversal of 12121333131 is 13133312121.

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 12121333131 - 2⁶ = 12121333067 is a prime.

It is a super-2 number, since 2×12121333131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12121333098 and 12121333107.

It is not an unprimeable number, because it can be changed into a prime (12121333151) 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, 33925 + ... + 159353.

It is an arithmetic number, because the mean of its divisors is an integer number (2020301010).

Almost surely, 2^12121333131 is an apocalyptic number.

12121333131 is a deficient number, since it is larger than the sum of its proper divisors (4041074949).

12121333131 is a wasteful number, since it uses less digits than its factorization.

12121333131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157645.

The product of its digits is 324, while the sum is 21.

Adding to 12121333131 its reverse (13133312121), we get a palindrome (25254645252).

The spelling of 12121333131 in words is "twelve billion, one hundred twenty-one million, three hundred thirty-three thousand, one hundred thirty-one".