201201323121 has 24 divisors (see below), whose sum is σ = 291799609920. Its totient is φ = 133592016096.

The previous prime is 201201323093. The next prime is 201201323131. The reversal of 201201323121 is 121323102102.

201201323121 is a `hidden beast` number, since 20 + 1 + 201 + 323 + 121 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-201201323121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201201323094 and 201201323103.

It is not an unprimeable number, because it can be changed into a prime (201201323131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8527086 + ... + 8550648.

It is an arithmetic number, because the mean of its divisors is an integer number (12158317080).

Almost surely, 2^201201323121 is an apocalyptic number.

It is an amenable number.

201201323121 is a deficient number, since it is larger than the sum of its proper divisors (90598286799).

201201323121 is a wasteful number, since it uses less digits than its factorization.

201201323121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27365 (or 27362 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201201323121 its reverse (121323102102), we get a palindrome (322524425223).

The spelling of 201201323121 in words is "two hundred one billion, two hundred one million, three hundred twenty-three thousand, one hundred twenty-one".