2001212102138 has 8 divisors (see below), whose sum is σ = 3001824155232. Its totient is φ = 1000604050396.

The previous prime is 2001212102137. The next prime is 2001212102171. The reversal of 2001212102138 is 8312012121002.

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

It is not an unprimeable number, because it can be changed into a prime (2001212102137) 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 3 ways as a sum of consecutive naturals, for example, 1479881 + ... + 2488467.

It is an arithmetic number, because the mean of its divisors is an integer number (375228019404).

Almost surely, 2^{2001212102138} is an apocalyptic number.

2001212102138 is a deficient number, since it is larger than the sum of its proper divisors (1000612053094).

2001212102138 is a wasteful number, since it uses less digits than its factorization.

2001212102138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000676.

The product of its (nonzero) digits is 384, while the sum is 23.

The spelling of 2001212102138 in words is "two trillion, one billion, two hundred twelve million, one hundred two thousand, one hundred thirty-eight".