133120317427621 has 4 divisors (see below), whose sum is σ = 133120402877644. Its totient is φ = 133120231977600.

The previous prime is 133120317427613. The next prime is 133120317427627. The reversal of 133120317427621 is 126724713021331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35166026709025 + 97954290718596 = 5930095^2 + 9897186^2 .

It is a cyclic number.

It is not a de Polignac number, because 133120317427621 - 2³ = 133120317427613 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 (133120317427627) 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, 40343970 + ... + 43518691.

It is an arithmetic number, because the mean of its divisors is an integer number (33280100719411).

Almost surely, 2^{133120317427621} is an apocalyptic number.

It is an amenable number.

133120317427621 is a deficient number, since it is larger than the sum of its proper divisors (85450023).

133120317427621 is an equidigital number, since it uses as much as digits as its factorization.

133120317427621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85450022.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 133120317427621 in words is "one hundred thirty-three trillion, one hundred twenty billion, three hundred seventeen million, four hundred twenty-seven thousand, six hundred twenty-one".