2001111210121 has 8 divisors (see below), whose sum is σ = 2003267592000. Its totient is φ = 1998955339440.

The previous prime is 2001111210071. The next prime is 2001111210139. The reversal of 2001111210121 is 1210121111002.

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 2001111210121 - 2³³ = 1992521275529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001111210191) 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, 7981530 + ... + 8228428.

It is an arithmetic number, because the mean of its divisors is an integer number (250408449000).

Almost surely, 2^{2001111210121} is an apocalyptic number.

It is an amenable number.

2001111210121 is a deficient number, since it is larger than the sum of its proper divisors (2156381879).

2001111210121 is a wasteful number, since it uses less digits than its factorization.

2001111210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255599.

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

Adding to 2001111210121 its reverse (1210121111002), we get a palindrome (3211232321123).

The spelling of 2001111210121 in words is "two trillion, one billion, one hundred eleven million, two hundred ten thousand, one hundred twenty-one".