121315230 has 96 divisors (see below), whose sum is σ = 343160064. Its totient is φ = 29611008.

The previous prime is 121315219. The next prime is 121315237. The reversal of 121315230 is 32513121.

121315230 is a `hidden beast` number, since 12 + 131 + 523 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121315237) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55539 + ... + 57681.

It is an arithmetic number, because the mean of its divisors is an integer number (3574584).

Almost surely, 2^121315230 is an apocalyptic number.

121315230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121315230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171580032).

121315230 is an abundant number, since it is smaller than the sum of its proper divisors (221844834).

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

121315230 is a wasteful number, since it uses less digits than its factorization.

121315230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210 (or 2207 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 121315230 is about 11014.3193162356. The cubic root of 121315230 is about 495.0378911919.

Adding to 121315230 its reverse (32513121), we get a palindrome (153828351).

The spelling of 121315230 in words is "one hundred twenty-one million, three hundred fifteen thousand, two hundred thirty".