2001211211212 has 12 divisors (see below), whose sum is σ = 3534849710280. Its totient is φ = 991254151136.

The previous prime is 2001211211171. The next prime is 2001211211239. The reversal of 2001211211212 is 2121121121002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2337863137 + ... + 2337863992.

It is an arithmetic number, because the mean of its divisors is an integer number (294570809190).

Almost surely, 2^{2001211211212} is an apocalyptic number.

It is an amenable number.

2001211211212 is a deficient number, since it is larger than the sum of its proper divisors (1533638499068).

2001211211212 is a wasteful number, since it uses less digits than its factorization.

2001211211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4675727240 (or 4675727238 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2001211211212 its reverse (2121121121002), we get a palindrome (4122332332214).

The spelling of 2001211211212 in words is "two trillion, one billion, two hundred eleven million, two hundred eleven thousand, two hundred twelve".