121078 has 4 divisors (see below), whose sum is σ = 181620. Its totient is φ = 60538.

The previous prime is 121067. The next prime is 121081. The reversal of 121078 is 870121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 870121 = 7 ⋅124303.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30268 + ... + 30271.

It is an arithmetic number, because the mean of its divisors is an integer number (45405).

2¹²¹⁰⁷⁸ is an apocalyptic number.

121078 is a deficient number, since it is larger than the sum of its proper divisors (60542).

121078 is an equidigital number, since it uses as much as digits as its factorization.

121078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60541.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 121078 is about 347.9626416729. The cubic root of 121078 is about 49.4715001061.

Adding to 121078 its reverse (870121), we get a palindrome (991199).

The spelling of 121078 in words is "one hundred twenty-one thousand, seventy-eight".