2001211201121 has 8 divisors (see below), whose sum is σ = 2194221420864. Its totient is φ = 1810047969520.

The previous prime is 2001211201117. The next prime is 2001211201237. The reversal of 2001211201121 is 1211021121002.

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 2001211201121 - 2² = 2001211201117 is a prime.

It is a super-3 number, since 3×2001211201121³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001211201096 and 2001211201105.

It is not an unprimeable number, because it can be changed into a prime (2001211251121) 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 7 ways as a sum of consecutive naturals, for example, 461744765 + ... + 461749098.

It is an arithmetic number, because the mean of its divisors is an integer number (274277677608).

Almost surely, 2^{2001211201121} is an apocalyptic number.

It is an amenable number.

2001211201121 is a deficient number, since it is larger than the sum of its proper divisors (193010219743).

2001211201121 is a wasteful number, since it uses less digits than its factorization.

2001211201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923494071.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2001211201121 its reverse (1211021121002), we get a palindrome (3212232322123).

The spelling of 2001211201121 in words is "two trillion, one billion, two hundred eleven million, two hundred one thousand, one hundred twenty-one".