133662121 has 4 divisors (see below), whose sum is σ = 135272592. Its totient is φ = 132051652.

The previous prime is 133662101. The next prime is 133662149. The reversal of 133662121 is 121266331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121266331 = 127 ⋅954853.

It is a cyclic number.

It is not a de Polignac number, because 133662121 - 2¹¹ = 133660073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133662101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805111 + ... + 805276.

It is an arithmetic number, because the mean of its divisors is an integer number (33818148).

Almost surely, 2^133662121 is an apocalyptic number.

It is an amenable number.

133662121 is a deficient number, since it is larger than the sum of its proper divisors (1610471).

133662121 is an equidigital number, since it uses as much as digits as its factorization.

133662121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610470.

The product of its digits is 1296, while the sum is 25.

The square root of 133662121 is about 11561.2335414522. The cubic root of 133662121 is about 511.2925320554.

The spelling of 133662121 in words is "one hundred thirty-three million, six hundred sixty-two thousand, one hundred twenty-one".