2121212001009 has 8 divisors (see below), whose sum is σ = 2836294801632. Its totient is φ = 1410135267200.

The previous prime is 2121212001001. The next prime is 2121212001031. The reversal of 2121212001009 is 9001002121212.

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 2121212001009 - 2³ = 2121212001001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121212001001) 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, 1001515467 + ... + 1001517584.

It is an arithmetic number, because the mean of its divisors is an integer number (354536850204).

Almost surely, 2^{2121212001009} is an apocalyptic number.

It is an amenable number.

2121212001009 is a deficient number, since it is larger than the sum of its proper divisors (715082800623).

2121212001009 is a wasteful number, since it uses less digits than its factorization.

2121212001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003033407.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 2121212001009 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, one thousand, nine".