2001222009999 has 12 divisors (see below), whose sum is σ = 2911753680576. Its totient is φ = 1324409699232.

The previous prime is 2001222009989. The next prime is 2001222010031. The reversal of 2001222009999 is 9999002221002.

It is not a de Polignac number, because 2001222009999 - 2²¹ = 2001219912847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001222009989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 811524319 + ... + 811526784.

It is an arithmetic number, because the mean of its divisors is an integer number (242646140048).

Almost surely, 2^{2001222009999} is an apocalyptic number.

2001222009999 is a deficient number, since it is larger than the sum of its proper divisors (910531670577).

2001222009999 is a wasteful number, since it uses less digits than its factorization.

2001222009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623051246 (or 1623051243 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 2001222009999 in words is "two trillion, one billion, two hundred twenty-two million, nine thousand, nine hundred ninety-nine".