133214421 has 4 divisors (see below), whose sum is σ = 177619232. Its totient is φ = 88809612.

The previous prime is 133214401. The next prime is 133214443. The reversal of 133214421 is 124412331.

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 not a de Polignac number, because 133214421 - 2⁹ = 133213909 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 (133214401) 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, 22202401 + ... + 22202406.

It is an arithmetic number, because the mean of its divisors is an integer number (44404808).

Almost surely, 2^133214421 is an apocalyptic number.

It is an amenable number.

133214421 is a deficient number, since it is larger than the sum of its proper divisors (44404811).

133214421 is an equidigital number, since it uses as much as digits as its factorization.

133214421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44404810.

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

The square root of 133214421 is about 11541.8551801693. The cubic root of 133214421 is about 510.7210370200.

Adding to 133214421 its reverse (124412331), we get a palindrome (257626752).

It can be divided in two parts, 1332 and 14421, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 133214421 in words is "one hundred thirty-three million, two hundred fourteen thousand, four hundred twenty-one".