121690730159 has 4 divisors (see below), whose sum is σ = 121725236304. Its totient is φ = 121656224016.

The previous prime is 121690730141. The next prime is 121690730173. The reversal of 121690730159 is 951037096121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121690730159 - 2¹² = 121690726063 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 (121690730179) 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, 17247782 + ... + 17254835.

It is an arithmetic number, because the mean of its divisors is an integer number (30431309076).

Almost surely, 2^121690730159 is an apocalyptic number.

121690730159 is a deficient number, since it is larger than the sum of its proper divisors (34506145).

121690730159 is an equidigital number, since it uses as much as digits as its factorization.

121690730159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34506144.

The product of its (nonzero) digits is 102060, while the sum is 44.

The spelling of 121690730159 in words is "one hundred twenty-one billion, six hundred ninety million, seven hundred thirty thousand, one hundred fifty-nine".