121923078 has 16 divisors (see below), whose sum is σ = 243954480. Its totient is φ = 40622976.

The previous prime is 121923077. The next prime is 121923089. The reversal of 121923078 is 870329121.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121923073) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 23418 + ... + 28146.

It is an arithmetic number, because the mean of its divisors is an integer number (15247155).

Almost surely, 2^121923078 is an apocalyptic number.

121923078 is an abundant number, since it is smaller than the sum of its proper divisors (122031402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121923078 is a wasteful number, since it uses less digits than its factorization.

121923078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9031.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 121923078 is about 11041.8783728132. The cubic root of 121923078 is about 495.8633072638.

The spelling of 121923078 in words is "one hundred twenty-one million, nine hundred twenty-three thousand, seventy-eight".