9012121021001 has 4 divisors (see below), whose sum is σ = 10299566881152. Its totient is φ = 7724675160852.

The previous prime is 9012121020989. The next prime is 9012121021039. The reversal of 9012121021001 is 1001201212109.

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 9012121021001 - 2⁶ = 9012121020937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9012121021091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643722930065 + ... + 643722930078.

It is an arithmetic number, because the mean of its divisors is an integer number (2574891720288).

Almost surely, 2^{9012121021001} is an apocalyptic number.

It is an amenable number.

9012121021001 is a deficient number, since it is larger than the sum of its proper divisors (1287445860151).

9012121021001 is a wasteful number, since it uses less digits than its factorization.

9012121021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287445860150.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 9012121021001 in words is "nine trillion, twelve billion, one hundred twenty-one million, twenty-one thousand, one".