201220721197 has 16 divisors (see below), whose sum is σ = 202875904000. Its totient is φ = 199573236720.

The previous prime is 201220721183. The next prime is 201220721203. The reversal of 201220721197 is 791127022102.

201220721197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 201220721197 - 2¹¹ = 201220719149 is a prime.

It is a super-2 number, since 2×201220721197² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220721497) 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 15 ways as a sum of consecutive naturals, for example, 151635148 + ... + 151636474.

It is an arithmetic number, because the mean of its divisors is an integer number (12679744000).

Almost surely, 2^201220721197 is an apocalyptic number.

It is an amenable number.

201220721197 is a deficient number, since it is larger than the sum of its proper divisors (1655182803).

201220721197 is a wasteful number, since it uses less digits than its factorization.

201220721197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3376.

The product of its (nonzero) digits is 7056, while the sum is 34.

Adding to 201220721197 its reverse (791127022102), we get a palindrome (992347743299).

The spelling of 201220721197 in words is "two hundred one billion, two hundred twenty million, seven hundred twenty-one thousand, one hundred ninety-seven".