121150231500 has 192 divisors, whose sum is σ = 360850194432. Its totient is φ = 31570720000.

The previous prime is 121150231471. The next prime is 121150231507. The reversal of 121150231500 is 5132051121.

It is not an unprimeable number, because it can be changed into a prime (121150231507) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81144754 + ... + 81146246.

It is an arithmetic number, because the mean of its divisors is an integer number (1879428096).

Almost surely, 2^121150231500 is an apocalyptic number.

121150231500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121150231500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180425097216).

121150231500 is an abundant number, since it is smaller than the sum of its proper divisors (239699962932).

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

121150231500 is a wasteful number, since it uses less digits than its factorization.

121150231500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713 (or 2701 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 121150231500 its reverse (5132051121), we get a palindrome (126282282621).

The spelling of 121150231500 in words is "one hundred twenty-one billion, one hundred fifty million, two hundred thirty-one thousand, five hundred".