64135103121 has 12 divisors (see below), whose sum is σ = 93556818420. Its totient is φ = 42333400800.

The previous prime is 64135103119. The next prime is 64135103147. The reversal of 64135103121 is 12130153146.

It is a happy number.

64135103121 is a `hidden beast` number, since 641 + 3 + 5 + 1 + 0 + 3 + 12 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38960838225 + 25174264896 = 197385^2 + 158664^2 .

It is not a de Polignac number, because 64135103121 - 2¹ = 64135103119 is a prime.

It is a super-2 number, since 2×64135103121² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64135103191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35276926 + ... + 35278743.

It is an arithmetic number, because the mean of its divisors is an integer number (7796401535).

Almost surely, 2^64135103121 is an apocalyptic number.

It is an amenable number.

64135103121 is a deficient number, since it is larger than the sum of its proper divisors (29421715299).

64135103121 is a wasteful number, since it uses less digits than its factorization.

64135103121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70555776 (or 70555773 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 64135103121 its reverse (12130153146), we get a palindrome (76265256267).

The spelling of 64135103121 in words is "sixty-four billion, one hundred thirty-five million, one hundred three thousand, one hundred twenty-one".