121617150139 has 4 divisors (see below), whose sum is σ = 122732903920. Its totient is φ = 120501396360.

The previous prime is 121617150101. The next prime is 121617150173. The reversal of 121617150139 is 931051716121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931051716121 = 9209 ⋅101102369.

It is a cyclic number.

It is not a de Polignac number, because 121617150139 - 2⁹ = 121617149627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121617150098 and 121617150107.

It is not an unprimeable number, because it can be changed into a prime (121617150539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557876727 + ... + 557876944.

It is an arithmetic number, because the mean of its divisors is an integer number (30683225980).

Almost surely, 2^121617150139 is an apocalyptic number.

121617150139 is a deficient number, since it is larger than the sum of its proper divisors (1115753781).

121617150139 is a wasteful number, since it uses less digits than its factorization.

121617150139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115753780.

The product of its (nonzero) digits is 11340, while the sum is 37.

The spelling of 121617150139 in words is "one hundred twenty-one billion, six hundred seventeen million, one hundred fifty thousand, one hundred thirty-nine".