12121121001001 has 8 divisors (see below), whose sum is σ = 12403392702624. Its totient is φ = 11838866807040.

The previous prime is 12121121000969. The next prime is 12121121001013. The reversal of 12121121001001 is 10010012112121.

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 12121121001001 - 2⁵ = 12121121000969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121121011001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2970931 + ... + 5750536.

It is an arithmetic number, because the mean of its divisors is an integer number (1550424087828).

Almost surely, 2^{12121121001001} is an apocalyptic number.

It is an amenable number.

12121121001001 is a deficient number, since it is larger than the sum of its proper divisors (282271701623).

12121121001001 is an equidigital number, since it uses as much as digits as its factorization.

12121121001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8753831.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12121121001001 its reverse (10010012112121), we get a palindrome (22131133113122).

The spelling of 12121121001001 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-one million, one thousand, one".