2001201121201 has 2 divisors, whose sum is σ = 2001201121202. Its totient is φ = 2001201121200.

The previous prime is 2001201121169. The next prime is 2001201121261. The reversal of 2001201121201 is 1021211021002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1224229389601 + 776971731600 = 1106449^2 + 881460^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001201121201 - 2⁵ = 2001201121169 is a prime.

It is a super-2 number, since 2×2001201121201² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2001201121261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000600560600 + 1000600560601.

It is an arithmetic number, because the mean of its divisors is an integer number (1000600560601).

Almost surely, 2^{2001201121201} is an apocalyptic number.

It is an amenable number.

2001201121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001201121201 is an equidigital number, since it uses as much as digits as its factorization.

2001201121201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001201121201 its reverse (1021211021002), we get a palindrome (3022412142203).

The spelling of 2001201121201 in words is "two trillion, one billion, two hundred one million, one hundred twenty-one thousand, two hundred one".