12121201000008 has 48 divisors (see below), whose sum is σ = 32849695366800. Its totient is φ = 4037761236960.

The previous prime is 12121200999937. The next prime is 12121201000009. The reversal of 12121201000008 is 80000010212121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12121201000009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54870178 + ... + 55090641.

It is an arithmetic number, because the mean of its divisors is an integer number (684368653475).

Almost surely, 2^{12121201000008} is an apocalyptic number.

12121201000008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12121201000008 is an abundant number, since it is smaller than the sum of its proper divisors (20728494366792).

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

12121201000008 is a wasteful number, since it uses less digits than its factorization.

12121201000008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109962362 (or 109962355 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12121201000008 its reverse (80000010212121), we get a palindrome (92121211212129).

The spelling of 12121201000008 in words is "twelve trillion, one hundred twenty-one billion, two hundred one million, eight", and thus it is an aban number.