2001012221002 has 16 divisors (see below), whose sum is σ = 3084015340224. Its totient is φ = 973154556000.

The previous prime is 2001012220937. The next prime is 2001012221003. The reversal of 2001012221002 is 2001222101002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2001012221003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36834774 + ... + 36889057.

It is an arithmetic number, because the mean of its divisors is an integer number (192750958764).

Almost surely, 2^{2001012221002} is an apocalyptic number.

2001012221002 is a deficient number, since it is larger than the sum of its proper divisors (1083003119222).

2001012221002 is a wasteful number, since it uses less digits than its factorization.

2001012221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73724205.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001012221002 its reverse (2001222101002), we get a palindrome (4002234322004).

The spelling of 2001012221002 in words is "two trillion, one billion, twelve million, two hundred twenty-one thousand, two".