201121022121213 has 16 divisors (see below), whose sum is σ = 272162944662336. Its totient is φ = 132093736801920.

The previous prime is 201121022121167. The next prime is 201121022121233. The reversal of 201121022121213 is 312121220121102.

It is not a de Polignac number, because 201121022121213 - 2¹⁶ = 201121022055677 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 201121022121213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121022121233) 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, 1730729856 + ... + 1730846057.

It is an arithmetic number, because the mean of its divisors is an integer number (17010184041396).

Almost surely, 2^{201121022121213} is an apocalyptic number.

It is an amenable number.

201121022121213 is a deficient number, since it is larger than the sum of its proper divisors (71041922541123).

201121022121213 is a wasteful number, since it uses less digits than its factorization.

201121022121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3461576204.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 201121022121213 its reverse (312121220121102), we get a palindrome (513242242242315).

The spelling of 201121022121213 in words is "two hundred one trillion, one hundred twenty-one billion, twenty-two million, one hundred twenty-one thousand, two hundred thirteen".