133124424403021 has 4 divisors (see below), whose sum is σ = 133505869745500. Its totient is φ = 132742979060544.

The previous prime is 133124424402997. The next prime is 133124424403073. The reversal of 133124424403021 is 120304424421331.

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 63040503438025 + 70083920964996 = 7939805^2 + 8371614^2 .

It is a cyclic number.

It is not a de Polignac number, because 133124424403021 - 2³³ = 133115834468429 is a prime.

It is a super-2 number, since 2×133124424403021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133124424403121) 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, 190722670716 + ... + 190722671413.

It is an arithmetic number, because the mean of its divisors is an integer number (33376467436375).

Almost surely, 2^{133124424403021} is an apocalyptic number.

It is an amenable number.

133124424403021 is a deficient number, since it is larger than the sum of its proper divisors (381445342479).

133124424403021 is an equidigital number, since it uses as much as digits as its factorization.

133124424403021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381445342478.

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 133124424403021 its reverse (120304424421331), we get a palindrome (253428848824352).

The spelling of 133124424403021 in words is "one hundred thirty-three trillion, one hundred twenty-four billion, four hundred twenty-four million, four hundred three thousand, twenty-one".