121465818 has 40 divisors (see below), whose sum is σ = 275647680. Its totient is φ = 39971880.

The previous prime is 121465811. The next prime is 121465831. The reversal of 121465818 is 818564121.

It is not an unprimeable number, because it can be changed into a prime (121465811) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8053 + ... + 17543.

It is an arithmetic number, because the mean of its divisors is an integer number (6891192).

Almost surely, 2^121465818 is an apocalyptic number.

121465818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121465818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137823840).

121465818 is an abundant number, since it is smaller than the sum of its proper divisors (154181862).

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

121465818 is an equidigital number, since it uses as much as digits as its factorization.

121465818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9584 (or 9575 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 121465818 is about 11021.1532064480. The cubic root of 121465818 is about 495.2426358678.

The spelling of 121465818 in words is "one hundred twenty-one million, four hundred sixty-five thousand, eight hundred eighteen".