2001212221012 has 12 divisors (see below), whose sum is σ = 3502432958976. Its totient is φ = 1000517089880.

The previous prime is 2001212220979. The next prime is 2001212221033. The reversal of 2001212221012 is 2101222121002.

It is a happy number.

It is a congruent number.

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, 22204564 + ... + 22294507.

It is an arithmetic number, because the mean of its divisors is an integer number (291869413248).

Almost surely, 2^{2001212221012} is an apocalyptic number.

It is an amenable number.

2001212221012 is a deficient number, since it is larger than the sum of its proper divisors (1501220737964).

2001212221012 is a wasteful number, since it uses less digits than its factorization.

2001212221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44510318 (or 44510316 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2001212221012 its reverse (2101222121002), we get a palindrome (4102434342014).

The spelling of 2001212221012 in words is "two trillion, one billion, two hundred twelve million, two hundred twenty-one thousand, twelve".