12121010010001 has 4 divisors (see below), whose sum is σ = 12121075969600. Its totient is φ = 12120944050404.

The previous prime is 12121010009987. The next prime is 12121010010029. The reversal of 12121010010001 is 10001001012121.

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 not a de Polignac number, because 12121010010001 - 2¹⁵ = 12121009977233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121010010001.

It is not an unprimeable number, because it can be changed into a prime (12121010010041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32703381 + ... + 33071938.

It is an arithmetic number, because the mean of its divisors is an integer number (3030268992400).

Almost surely, 2^{12121010010001} is an apocalyptic number.

It is an amenable number.

12121010010001 is a deficient number, since it is larger than the sum of its proper divisors (65959599).

12121010010001 is an equidigital number, since it uses as much as digits as its factorization.

12121010010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65959598.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12121010010001 its reverse (10001001012121), we get a palindrome (22122011022122).

The spelling of 12121010010001 in words is "twelve trillion, one hundred twenty-one billion, ten million, ten thousand, one".