133523415152021 has 4 divisors (see below), whose sum is σ = 133523629009344. Its totient is φ = 133523201294700.

The previous prime is 133523415152003. The next prime is 133523415152051. The reversal of 133523415152021 is 120251514325331.

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 133523415152021 - 2¹⁴ = 133523415135637 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 (133523415152051) 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, 105989375 + ... + 107241756.

It is an arithmetic number, because the mean of its divisors is an integer number (33380907252336).

Almost surely, 2^{133523415152021} is an apocalyptic number.

It is an amenable number.

133523415152021 is a deficient number, since it is larger than the sum of its proper divisors (213857323).

133523415152021 is an equidigital number, since it uses as much as digits as its factorization.

133523415152021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213857322.

The product of its (nonzero) digits is 108000, while the sum is 38.

Adding to 133523415152021 its reverse (120251514325331), we get a palindrome (253774929477352).

The spelling of 133523415152021 in words is "one hundred thirty-three trillion, five hundred twenty-three billion, four hundred fifteen million, one hundred fifty-two thousand, twenty-one".