2001121211212 has 24 divisors (see below), whose sum is σ = 3507533568000. Its totient is φ = 998970001680.

The previous prime is 2001121211207. The next prime is 2001121211233. The reversal of 2001121211212 is 2121121211002.

It is a super-2 number, since 2×2001121211212² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6364137 + ... + 6671167.

It is an arithmetic number, because the mean of its divisors is an integer number (146147232000).

Almost surely, 2^{2001121211212} is an apocalyptic number.

It is an amenable number.

2001121211212 is a deficient number, since it is larger than the sum of its proper divisors (1506412356788).

2001121211212 is a wasteful number, since it uses less digits than its factorization.

2001121211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309621 (or 309619 counting only the distinct ones).

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

Adding to 2001121211212 its reverse (2121121211002), we get a palindrome (4122242422214).

The spelling of 2001121211212 in words is "two trillion, one billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".