133126406421005 has 4 divisors (see below), whose sum is σ = 159751687705212. Its totient is φ = 106501125136800.

The previous prime is 133126406420963. The next prime is 133126406421059. The reversal of 133126406421005 is 500124604621331.

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 98644683592009 + 34481722828996 = 9932003^2 + 5872114^2 .

It is a de Polignac number, because none of the positive numbers 2^k-133126406421005 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 133126406421005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13312640642096 + ... + 13312640642105.

It is an arithmetic number, because the mean of its divisors is an integer number (39937921926303).

Almost surely, 2^{133126406421005} is an apocalyptic number.

It is an amenable number.

133126406421005 is a deficient number, since it is larger than the sum of its proper divisors (26625281284207).

133126406421005 is an equidigital number, since it uses as much as digits as its factorization.

133126406421005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26625281284206.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 133126406421005 in words is "one hundred thirty-three trillion, one hundred twenty-six billion, four hundred six million, four hundred twenty-one thousand, five".