2001012212212 has 24 divisors (see below), whose sum is σ = 3793452845000. Its totient is φ = 923544093888.

The previous prime is 2001012212207. The next prime is 2001012212233. The reversal of 2001012212212 is 2122122101002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 378537484516 + 1622474727696 = 615254^2 + 1273764^2 .

It is a congruent number.

It is an unprimeable number.

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, 113840337 + ... + 113857912.

Almost surely, 2^{2001012212212} is an apocalyptic number.

It is an amenable number.

2001012212212 is a deficient number, since it is larger than the sum of its proper divisors (1792440632788).

2001012212212 is a wasteful number, since it uses less digits than its factorization.

2001012212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227698292 (or 227698264 counting only the distinct ones).

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

Adding to 2001012212212 its reverse (2122122101002), we get a palindrome (4123134313214).

The spelling of 2001012212212 in words is "two trillion, one billion, twelve million, two hundred twelve thousand, two hundred twelve".