133121233464605 has 4 divisors (see below), whose sum is σ = 159745480157532. Its totient is φ = 106496986771680.

The previous prime is 133121233464589. The next prime is 133121233464613. The reversal of 133121233464605 is 506464332121331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55236690115321 + 77884543349284 = 7432139^2 + 8825222^2 .

It is not a de Polignac number, because 133121233464605 - 2⁴ = 133121233464589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13312123346456 + ... + 13312123346465.

It is an arithmetic number, because the mean of its divisors is an integer number (39936370039383).

Almost surely, 2^{133121233464605} is an apocalyptic number.

It is an amenable number.

133121233464605 is a deficient number, since it is larger than the sum of its proper divisors (26624246692927).

133121233464605 is an equidigital number, since it uses as much as digits as its factorization.

133121233464605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26624246692926.

The product of its (nonzero) digits is 933120, while the sum is 44.

Adding to 133121233464605 its reverse (506464332121331), we get a palindrome (639585565585936).

The spelling of 133121233464605 in words is "one hundred thirty-three trillion, one hundred twenty-one billion, two hundred thirty-three million, four hundred sixty-four thousand, six hundred five".