133508220455021 has 4 divisors (see below), whose sum is σ = 133509471212544. Its totient is φ = 133506969697500.

The previous prime is 133508220455017. The next prime is 133508220455023. The reversal of 133508220455021 is 120554022805331.

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 133508220455021 - 2² = 133508220455017 is a prime.

It is a super-2 number, since 2×133508220455021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133508220455021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133508220455023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625218635 + ... + 625432136.

It is an arithmetic number, because the mean of its divisors is an integer number (33377367803136).

Almost surely, 2^{133508220455021} is an apocalyptic number.

It is an amenable number.

133508220455021 is a deficient number, since it is larger than the sum of its proper divisors (1250757523).

133508220455021 is a wasteful number, since it uses less digits than its factorization.

133508220455021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250757522.

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 133508220455021 in words is "one hundred thirty-three trillion, five hundred eight billion, two hundred twenty million, four hundred fifty-five thousand, twenty-one".