641330121201 has 16 divisors (see below), whose sum is σ = 1066107214848. Its totient is φ = 333158504400.

The previous prime is 641330121191. The next prime is 641330121217. The reversal of 641330121201 is 102121033146.

It is a happy number.

It is not a de Polignac number, because 641330121201 - 2⁶ = 641330121137 is a prime.

It is a super-2 number, since 2×641330121201² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (641330121701) 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, 1388160205 + ... + 1388160666.

It is an arithmetic number, because the mean of its divisors is an integer number (66631700928).

Almost surely, 2^641330121201 is an apocalyptic number.

It is an amenable number.

641330121201 is a deficient number, since it is larger than the sum of its proper divisors (424777093647).

641330121201 is a wasteful number, since it uses less digits than its factorization.

641330121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776320892.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 641330121201 its reverse (102121033146), we get a palindrome (743451154347).

The spelling of 641330121201 in words is "six hundred forty-one billion, three hundred thirty million, one hundred twenty-one thousand, two hundred one".