121178013 has 16 divisors (see below), whose sum is σ = 177610752. Its totient is φ = 72878000.

The previous prime is 121178003. The next prime is 121178017. The reversal of 121178013 is 310871121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121178013 - 2¹⁰ = 121176989 is a prime.

It is a super-2 number, since 2×121178013² = 29368221669256338, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121178017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9693 + ... + 18338.

It is an arithmetic number, because the mean of its divisors is an integer number (11100672).

Almost surely, 2^121178013 is an apocalyptic number.

It is an amenable number.

121178013 is a deficient number, since it is larger than the sum of its proper divisors (56432739).

121178013 is a wasteful number, since it uses less digits than its factorization.

121178013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28176.

The product of its (nonzero) digits is 336, while the sum is 24.

The square root of 121178013 is about 11008.0885261702. The cubic root of 121178013 is about 494.8511786060.

The spelling of 121178013 in words is "one hundred twenty-one million, one hundred seventy-eight thousand, thirteen".