133355450021 has 4 divisors (see below), whose sum is σ = 134650163232. Its totient is φ = 132060736812.

The previous prime is 133355449999. The next prime is 133355450057. The reversal of 133355450021 is 120054553331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120054553331 = 8353 ⋅14372627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133355450021 is a prime.

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 133355450021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133355450621) 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, 647356451 + ... + 647356656.

It is an arithmetic number, because the mean of its divisors is an integer number (33662540808).

Almost surely, 2^133355450021 is an apocalyptic number.

It is an amenable number.

133355450021 is a deficient number, since it is larger than the sum of its proper divisors (1294713211).

133355450021 is a wasteful number, since it uses less digits than its factorization.

133355450021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294713210.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 133355450021 in words is "one hundred thirty-three billion, three hundred fifty-five million, four hundred fifty thousand, twenty-one".