121121018 has 16 divisors (see below), whose sum is σ = 185197320. Its totient is φ = 59400000.

The previous prime is 121121003. The next prime is 121121083. The reversal of 121121018 is 810121121.

It can be written as a sum of positive squares in 4 ways, for example, as 108638929 + 12482089 = 10423^2 + 3533^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121120987 and 121121005.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19268 + ... + 24768.

Almost surely, 2^121121018 is an apocalyptic number.

121121018 is a deficient number, since it is larger than the sum of its proper divisors (64076302).

121121018 is a wasteful number, since it uses less digits than its factorization.

121121018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5713.

The product of its (nonzero) digits is 32, while the sum is 17.

The square root of 121121018 is about 11005.4994434601. The cubic root of 121121018 is about 494.7735834900.

Adding to 121121018 its reverse (810121121), we get a palindrome (931242139).

The spelling of 121121018 in words is "one hundred twenty-one million, one hundred twenty-one thousand, eighteen".