121378033 has 4 divisors (see below), whose sum is σ = 138717760. Its totient is φ = 104038308.

The previous prime is 121378009. The next prime is 121378039. The reversal of 121378033 is 330873121.

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 a cyclic number.

It is not a de Polignac number, because 121378033 - 2⁵ = 121378001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121377992 and 121378010.

It is not an unprimeable number, because it can be changed into a prime (121378039) 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, 8669853 + ... + 8669866.

It is an arithmetic number, because the mean of its divisors is an integer number (34679440).

Almost surely, 2^121378033 is an apocalyptic number.

It is an amenable number.

121378033 is a deficient number, since it is larger than the sum of its proper divisors (17339727).

121378033 is an equidigital number, since it uses as much as digits as its factorization.

121378033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17339726.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 121378033 is about 11017.1699179054. The cubic root of 121378033 is about 495.1233009169.

The spelling of 121378033 in words is "one hundred twenty-one million, three hundred seventy-eight thousand, thirty-three".