12121333242 has 16 divisors (see below), whose sum is σ = 24549536640. Its totient is φ = 3989299392.

The previous prime is 12121333187. The next prime is 12121333243. The reversal of 12121333242 is 24233312121.

It is a super-2 number, since 2×12121333242² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12121333243) 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, 12785743 + ... + 12786690.

It is an arithmetic number, because the mean of its divisors is an integer number (1534346040).

Almost surely, 2^12121333242 is an apocalyptic number.

12121333242 is an abundant number, since it is smaller than the sum of its proper divisors (12428203398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121333242 is a wasteful number, since it uses less digits than its factorization.

12121333242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25572517.

The product of its digits is 1728, while the sum is 24.

Adding to 12121333242 its reverse (24233312121), we get a palindrome (36354645363).

The spelling of 12121333242 in words is "twelve billion, one hundred twenty-one million, three hundred thirty-three thousand, two hundred forty-two".