121351860 has 288 divisors, whose sum is σ = 458115840. Its totient is φ = 25380864.

The previous prime is 121351847. The next prime is 121351871. The reversal of 121351860 is 68153121.

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 95 ways as a sum of consecutive naturals, for example, 885712 + ... + 885848.

It is an arithmetic number, because the mean of its divisors is an integer number (1590680).

Almost surely, 2^121351860 is an apocalyptic number.

121351860 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 121351860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229057920).

121351860 is an abundant number, since it is smaller than the sum of its proper divisors (336763980).

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

121351860 is a wasteful number, since it uses less digits than its factorization.

121351860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 121351860 is about 11015.9820261291. The cubic root of 121351860 is about 495.0877101998.

The spelling of 121351860 in words is "one hundred twenty-one million, three hundred fifty-one thousand, eight hundred sixty".