133020526031621 has 4 divisors (see below), whose sum is σ = 133901456667744. Its totient is φ = 132139595395500.

The previous prime is 133020526031611. The next prime is 133020526031651. The reversal of 133020526031621 is 126130625020331.

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 a de Polignac number, because none of the positive numbers 2^k-133020526031621 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 (133020526031611) 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, 440465317835 + ... + 440465318136.

It is an arithmetic number, because the mean of its divisors is an integer number (33475364166936).

Almost surely, 2^{133020526031621} is an apocalyptic number.

It is an amenable number.

133020526031621 is a deficient number, since it is larger than the sum of its proper divisors (880930636123).

133020526031621 is an equidigital number, since it uses as much as digits as its factorization.

133020526031621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880930636122.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 133020526031621 in words is "one hundred thirty-three trillion, twenty billion, five hundred twenty-six million, thirty-one thousand, six hundred twenty-one".