2001212121201 has 8 divisors (see below), whose sum is σ = 2677778497824. Its totient is φ = 1329393579360.

The previous prime is 2001212121199. The next prime is 2001212121211. The reversal of 2001212121201 is 1021212121002.

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

It is not a de Polignac number, because 2001212121201 - 2¹ = 2001212121199 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2001212121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186957711 + ... + 1186959396.

It is an arithmetic number, because the mean of its divisors is an integer number (334722312228).

Almost surely, 2^{2001212121201} is an apocalyptic number.

It is an amenable number.

2001212121201 is a deficient number, since it is larger than the sum of its proper divisors (676566376623).

2001212121201 is a wasteful number, since it uses less digits than its factorization.

2001212121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373917391.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2001212121201 its reverse (1021212121002), we get a palindrome (3022424242203).

The spelling of 2001212121201 in words is "two trillion, one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred one".