2001212111201 has 16 divisors (see below), whose sum is σ = 2044176928848. Its totient is φ = 1958678092800.

The previous prime is 2001212111141. The next prime is 2001212111207. The reversal of 2001212111201 is 1021112121002.

It can be written as a sum of positive squares in 8 ways, for example, as 29378302801 + 1971833808400 = 171401^2 + 1404220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001212111201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001212111207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28577891 + ... + 28647831.

It is an arithmetic number, because the mean of its divisors is an integer number (127761058053).

Almost surely, 2^{2001212111201} is an apocalyptic number.

It is an amenable number.

2001212111201 is a deficient number, since it is larger than the sum of its proper divisors (42964817647).

2001212111201 is a wasteful number, since it uses less digits than its factorization.

2001212111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73012.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2001212111201 its reverse (1021112121002), we get a palindrome (3022324232203).

The spelling of 2001212111201 in words is "two trillion, one billion, two hundred twelve million, one hundred eleven thousand, two hundred one".