121323133 has 4 divisors (see below), whose sum is σ = 121478080. Its totient is φ = 121168188.

The previous prime is 121323107. The next prime is 121323143. The reversal of 121323133 is 331323121.

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: 331323121 = 19 ⋅17438059.

It is a cyclic number.

It is not a de Polignac number, because 121323133 - 2²⁵ = 87768701 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 121323133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121323143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76293 + ... + 77866.

It is an arithmetic number, because the mean of its divisors is an integer number (30369520).

Almost surely, 2^121323133 is an apocalyptic number.

It is an amenable number.

121323133 is a deficient number, since it is larger than the sum of its proper divisors (154947).

121323133 is an equidigital number, since it uses as much as digits as its factorization.

121323133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154946.

The product of its digits is 324, while the sum is 19.

The square root of 121323133 is about 11014.6780706474. The cubic root of 121323133 is about 495.0486405966.

Adding to 121323133 its reverse (331323121), we get a palindrome (452646254).

It can be divided in two parts, 121 and 323133, that multiplied together give a palindrome (39099093).

The spelling of 121323133 in words is "one hundred twenty-one million, three hundred twenty-three thousand, one hundred thirty-three".