121550031125 has 16 divisors (see below), whose sum is σ = 154921987584. Its totient is φ = 95171083600.

The previous prime is 121550031061. The next prime is 121550031137. The reversal of 121550031125 is 521130055121.

It is not a de Polignac number, because 121550031125 - 2⁶ = 121550031061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121550031094 and 121550031103.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10338809 + ... + 10350558.

It is an arithmetic number, because the mean of its divisors is an integer number (9682624224).

Almost surely, 2^121550031125 is an apocalyptic number.

It is an amenable number.

121550031125 is a deficient number, since it is larger than the sum of its proper divisors (33371956459).

121550031125 is an equidigital number, since it uses as much as digits as its factorization.

121550031125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20689429 (or 20689419 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 121550031125 its reverse (521130055121), we get a palindrome (642680086246).

The spelling of 121550031125 in words is "one hundred twenty-one billion, five hundred fifty million, thirty-one thousand, one hundred twenty-five".