121150231520 has 48 divisors (see below), whose sum is σ = 288996271200. Its totient is φ = 47989599744.

The previous prime is 121150231507. The next prime is 121150231529. The reversal of 121150231520 is 25132051121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121150231529) 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 7 ways as a sum of consecutive naturals, for example, 3659195 + ... + 3692154.

It is an arithmetic number, because the mean of its divisors is an integer number (6020755650).

Almost surely, 2^121150231520 is an apocalyptic number.

121150231520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121150231520 is an abundant number, since it is smaller than the sum of its proper divisors (167846039680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121150231520 is a wasteful number, since it uses less digits than its factorization.

121150231520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7351467 (or 7351459 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 121150231520 its reverse (25132051121), we get a palindrome (146282282641).

The spelling of 121150231520 in words is "one hundred twenty-one billion, one hundred fifty million, two hundred thirty-one thousand, five hundred twenty".