12121330012 has 24 divisors (see below), whose sum is σ = 23144123520. Its totient is φ = 5508885360.

The previous prime is 12121330009. The next prime is 12121330019. The reversal of 12121330012 is 21003312121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121330019) 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, 364539 + ... + 396397.

It is an arithmetic number, because the mean of its divisors is an integer number (964338480).

Almost surely, 2^12121330012 is an apocalyptic number.

It is an amenable number.

12121330012 is a deficient number, since it is larger than the sum of its proper divisors (11022793508).

12121330012 is a wasteful number, since it uses less digits than its factorization.

12121330012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40521 (or 40519 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12121330012 its reverse (21003312121), we get a palindrome (33124642133).

The spelling of 12121330012 in words is "twelve billion, one hundred twenty-one million, three hundred thirty thousand, twelve".