121308146173 has 4 divisors (see below), whose sum is σ = 122234162688. Its totient is φ = 120382129660.

The previous prime is 121308146143. The next prime is 121308146203. The reversal of 121308146173 is 371641803121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 371641803121 = 1087 ⋅341896783.

It is an interprime number because it is at equal distance from previous prime (121308146143) and next prime (121308146203).

It is a cyclic number.

It is not a de Polignac number, because 121308146173 - 2²¹ = 121306049021 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 (121308146123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463008061 + ... + 463008322.

It is an arithmetic number, because the mean of its divisors is an integer number (30558540672).

Almost surely, 2^121308146173 is an apocalyptic number.

It is an amenable number.

121308146173 is a deficient number, since it is larger than the sum of its proper divisors (926016515).

121308146173 is an equidigital number, since it uses as much as digits as its factorization.

121308146173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926016514.

The product of its (nonzero) digits is 24192, while the sum is 37.

Adding to 121308146173 its reverse (371641803121), we get a palindrome (492949949294).

The spelling of 121308146173 in words is "one hundred twenty-one billion, three hundred eight million, one hundred forty-six thousand, one hundred seventy-three".