121285568 has 56 divisors (see below), whose sum is σ = 250204224. Its totient is φ = 58291200.

The previous prime is 121285561. The next prime is 121285583. The reversal of 121285568 is 865582121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121285561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183158 + ... + 183818.

Almost surely, 2^121285568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121285568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125102112).

121285568 is an abundant number, since it is smaller than the sum of its proper divisors (128918656).

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

121285568 is an equidigital number, since it uses as much as digits as its factorization.

121285568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 771 counting only the distinct ones).

The product of its digits is 38400, while the sum is 38.

The square root of 121285568 is about 11012.9727140314. The cubic root of 121285568 is about 494.9975417352.

The spelling of 121285568 in words is "one hundred twenty-one million, two hundred eighty-five thousand, five hundred sixty-eight".