201020121221213 has 16 divisors (see below), whose sum is σ = 232015174347264. Its totient is φ = 170594589369600.

The previous prime is 201020121221191. The next prime is 201020121221261. The reversal of 201020121221213 is 312122121020102.

It is a cyclic number.

It is not a de Polignac number, because 201020121221213 - 2⁶ = 201020121221149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020151221213) 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, 49176956 + ... + 53107562.

It is an arithmetic number, because the mean of its divisors is an integer number (14500948396704).

Almost surely, 2^{201020121221213} is an apocalyptic number.

It is an amenable number.

201020121221213 is a deficient number, since it is larger than the sum of its proper divisors (30995053126051).

201020121221213 is a wasteful number, since it uses less digits than its factorization.

201020121221213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4003052.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 201020121221213 its reverse (312122121020102), we get a palindrome (513142242241315).

The spelling of 201020121221213 in words is "two hundred one trillion, twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred thirteen".