133256712626021 has 4 divisors (see below), whose sum is σ = 133336842941952. Its totient is φ = 133176582310092.

The previous prime is 133256712625957. The next prime is 133256712626033. The reversal of 133256712626021 is 120626217652331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133256712626021 - 2⁶ = 133256712625957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133256712616021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40065155471 + ... + 40065158796.

It is an arithmetic number, because the mean of its divisors is an integer number (33334210735488).

Almost surely, 2^{133256712626021} is an apocalyptic number.

It is an amenable number.

133256712626021 is a deficient number, since it is larger than the sum of its proper divisors (80130315931).

133256712626021 is an equidigital number, since it uses as much as digits as its factorization.

133256712626021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80130315930.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 133256712626021 in words is "one hundred thirty-three trillion, two hundred fifty-six billion, seven hundred twelve million, six hundred twenty-six thousand, twenty-one".