121233018 has 16 divisors (see below), whose sum is σ = 256728960. Its totient is φ = 38033856.

The previous prime is 121232987. The next prime is 121233019. The reversal of 121233018 is 810332121.

It is a super-3 number, since 3×121233018³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121232985 and 121233003.

It is not an unprimeable number, because it can be changed into a prime (121233019) 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, 594178 + ... + 594381.

It is an arithmetic number, because the mean of its divisors is an integer number (16045560).

Almost surely, 2^121233018 is an apocalyptic number.

121233018 is an abundant number, since it is smaller than the sum of its proper divisors (135495942).

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

121233018 is a wasteful number, since it uses less digits than its factorization.

121233018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188581.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 121233018 is about 11010.5866328729. The cubic root of 121233018 is about 494.9260413939.

Adding to 121233018 its reverse (810332121), we get a palindrome (931565139).

The spelling of 121233018 in words is "one hundred twenty-one million, two hundred thirty-three thousand, eighteen".