121817232 has 120 divisors (see below), whose sum is σ = 357477120. Its totient is φ = 38684160.

The previous prime is 121817231. The next prime is 121817239. The reversal of 121817232 is 232718121.

It is a super-3 number, since 3×121817232³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121817196 and 121817205.

It is not an unprimeable number, because it can be changed into a prime (121817231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 277269 + ... + 277707.

It is an arithmetic number, because the mean of its divisors is an integer number (2978976).

Almost surely, 2^121817232 is an apocalyptic number.

121817232 is a gapful number since it is divisible by the number (12) 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 121817232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178738560).

121817232 is an abundant number, since it is smaller than the sum of its proper divisors (235659888).

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

121817232 is a wasteful number, since it uses less digits than its factorization.

121817232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 532 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 121817232 is about 11037.0843976115. The cubic root of 121817232 is about 495.7197732041.

The spelling of 121817232 in words is "one hundred twenty-one million, eight hundred seventeen thousand, two hundred thirty-two".