2001221002212 has 24 divisors (see below), whose sum is σ = 4669753050816. Its totient is φ = 667039756128.

The previous prime is 2001221002189. The next prime is 2001221002213. The reversal of 2001221002212 is 2122001221002.

It is a junction number, because it is equal to n+sod(n) for n = 2001221002191 and 2001221002200.

It is not an unprimeable number, because it can be changed into a prime (2001221002213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3992448 + ... + 4465655.

It is an arithmetic number, because the mean of its divisors is an integer number (194573043784).

Almost surely, 2^{2001221002212} is an apocalyptic number.

It is an amenable number.

2001221002212 is an abundant number, since it is smaller than the sum of its proper divisors (2668532048604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001221002212 is a wasteful number, since it uses less digits than its factorization.

2001221002212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8477827 (or 8477825 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2001221002212 its reverse (2122001221002), we get a palindrome (4123222223214).

It can be divided in two parts, 2001221002 and 212, that multiplied together give a palindrome (424258852424).

The spelling of 2001221002212 in words is "two trillion, one billion, two hundred twenty-one million, two thousand, two hundred twelve".