133681608121 has 16 divisors (see below), whose sum is σ = 136974993408. Its totient is φ = 130432957200.

The previous prime is 133681608091. The next prime is 133681608133. The reversal of 133681608121 is 121806186331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 133681608121 - 2¹¹ = 133681606073 is a prime.

It is a super-2 number, since 2×133681608121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133681605121) 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, 3393886 + ... + 3433048.

It is an arithmetic number, because the mean of its divisors is an integer number (8560937088).

Almost surely, 2^133681608121 is an apocalyptic number.

It is an amenable number.

133681608121 is a deficient number, since it is larger than the sum of its proper divisors (3293385287).

133681608121 is a wasteful number, since it uses less digits than its factorization.

133681608121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39732.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 133681608121 in words is "one hundred thirty-three billion, six hundred eighty-one million, six hundred eight thousand, one hundred twenty-one".