133534005551221 has 16 divisors (see below), whose sum is σ = 154250199903168. Its totient is φ = 114247981843200.

The previous prime is 133534005551201. The next prime is 133534005551227. The reversal of 133534005551221 is 122155500435331.

It is a cyclic number.

It is not a de Polignac number, because 133534005551221 - 2²⁷ = 133533871333493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133534005551227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14100270 + ... + 21584383.

It is an arithmetic number, because the mean of its divisors is an integer number (9640637493948).

Almost surely, 2^{133534005551221} is an apocalyptic number.

133534005551221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133534005551221 is a deficient number, since it is larger than the sum of its proper divisors (20716194351947).

133534005551221 is a wasteful number, since it uses less digits than its factorization.

133534005551221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35704692.

The product of its (nonzero) digits is 270000, while the sum is 40.

Adding to 133534005551221 its reverse (122155500435331), we get a palindrome (255689505986552).

The spelling of 133534005551221 in words is "one hundred thirty-three trillion, five hundred thirty-four billion, five million, five hundred fifty-one thousand, two hundred twenty-one".