12121333333 has 4 divisors (see below), whose sum is σ = 12124329568. Its totient is φ = 12118337100.

The previous prime is 12121333307. The next prime is 12121333361. The reversal of 12121333333 is 33333312121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121333333 is a prime.

It is a Duffinian number.

12121333333 is a modest number, since divided by 333333 gives 12121 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12121333298 and 12121333307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121333633) 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, 1492041 + ... + 1500142.

It is an arithmetic number, because the mean of its divisors is an integer number (3031082392).

Almost surely, 2^12121333333 is an apocalyptic number.

It is an amenable number.

12121333333 is a deficient number, since it is larger than the sum of its proper divisors (2996235).

12121333333 is an equidigital number, since it uses as much as digits as its factorization.

12121333333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996234.

The product of its digits is 2916, while the sum is 25.

Adding to 12121333333 its reverse (33333312121), we get a palindrome (45454645454).

The spelling of 12121333333 in words is "twelve billion, one hundred twenty-one million, three hundred thirty-three thousand, three hundred thirty-three".