121986013 has 8 divisors (see below), whose sum is σ = 123784416. Its totient is φ = 120195600.

The previous prime is 121986001. The next prime is 121986037. The reversal of 121986013 is 310689121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121986013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121986413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33198 + ... + 36688.

It is an arithmetic number, because the mean of its divisors is an integer number (15473052).

Almost surely, 2^121986013 is an apocalyptic number.

It is an amenable number.

121986013 is a deficient number, since it is larger than the sum of its proper divisors (1798403).

121986013 is an equidigital number, since it uses as much as digits as its factorization.

121986013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3995.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 121986013 is about 11044.7278372987. The cubic root of 121986013 is about 495.9486118392.

The spelling of 121986013 in words is "one hundred twenty-one million, nine hundred eighty-six thousand, thirteen".