133124421 has 8 divisors (see below), whose sum is σ = 177881184. Its totient is φ = 88558640.

The previous prime is 133124389. The next prime is 133124423. The reversal of 133124421 is 124421331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133124421 - 2⁵ = 133124389 is a prime.

It is a super-2 number, since 2×133124421² = 35444222933170482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133124423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46110 + ... + 48911.

It is an arithmetic number, because the mean of its divisors is an integer number (22235148).

Almost surely, 2^133124421 is an apocalyptic number.

It is an amenable number.

133124421 is a deficient number, since it is larger than the sum of its proper divisors (44756763).

133124421 is an equidigital number, since it uses as much as digits as its factorization.

133124421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95491.

The product of its digits is 576, while the sum is 21.

The square root of 133124421 is about 11537.9556681416. The cubic root of 133124421 is about 510.6059963004.

Adding to 133124421 its reverse (124421331), we get a palindrome (257545752).

It can be divided in two parts, 1331 and 24421, that added together give a palindrome (25752).

The spelling of 133124421 in words is "one hundred thirty-three million, one hundred twenty-four thousand, four hundred twenty-one".