2001212122099 has 8 divisors (see below), whose sum is σ = 2056248845552. Its totient is φ = 1946561621760.

The previous prime is 2001212121973. The next prime is 2001212122139. The reversal of 2001212122099 is 9902212121002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001212122099 - 2²⁵ = 2001178567667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001212122099.

It is not an unprimeable number, because it can be changed into a prime (2001212126099) 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, 96545274 + ... + 96565999.

It is an arithmetic number, because the mean of its divisors is an integer number (257031105694).

Almost surely, 2^{2001212122099} is an apocalyptic number.

2001212122099 is a deficient number, since it is larger than the sum of its proper divisors (55036723453).

2001212122099 is a wasteful number, since it uses less digits than its factorization.

2001212122099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193111557.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 2001212122099 in words is "two trillion, one billion, two hundred twelve million, one hundred twenty-two thousand, ninety-nine".