121712078 has 8 divisors (see below), whose sum is σ = 193307472. Its totient is φ = 57276256.

The previous prime is 121712077. The next prime is 121712083. The reversal of 121712078 is 870217121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 121712078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121712077) 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, 1789850 + ... + 1789917.

It is an arithmetic number, because the mean of its divisors is an integer number (24163434).

Almost surely, 2^121712078 is an apocalyptic number.

121712078 is a deficient number, since it is larger than the sum of its proper divisors (71595394).

121712078 is a wasteful number, since it uses less digits than its factorization.

121712078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3579786.

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 121712078 is about 11032.3197016765. The cubic root of 121712078 is about 495.5770951877.

Adding to 121712078 its reverse (870217121), we get a palindrome (991929199).

The spelling of 121712078 in words is "one hundred twenty-one million, seven hundred twelve thousand, seventy-eight".