2001121222002 has 16 divisors (see below), whose sum is σ = 4573991364672. Its totient is φ = 571748920560.

The previous prime is 2001121221997. The next prime is 2001121222007. The reversal of 2001121222002 is 2002221211002.

It is an interprime number because it is at equal distance from previous prime (2001121221997) and next prime (2001121222007).

It is a super-2 number, since 2×2001121222002² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2001121222007) by changing a digit.

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, 23822871649 + ... + 23822871732.

It is an arithmetic number, because the mean of its divisors is an integer number (285874460292).

Almost surely, 2^{2001121222002} is an apocalyptic number.

2001121222002 is an abundant number, since it is smaller than the sum of its proper divisors (2572870142670).

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

2001121222002 is a wasteful number, since it uses less digits than its factorization.

2001121222002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47645743393.

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

Adding to 2001121222002 its reverse (2002221211002), we get a palindrome (4003342433004).

The spelling of 2001121222002 in words is "two trillion, one billion, one hundred twenty-one million, two hundred twenty-two thousand, two".