121019018 has 16 divisors (see below), whose sum is σ = 193938720. Its totient is φ = 56468016.

The previous prime is 121019011. The next prime is 121019021. The reversal of 121019018 is 810910121.

It is a junction number, because it is equal to n+sod(n) for n = 121018984 and 121019002.

It is not an unprimeable number, because it can be changed into a prime (121019011) 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, 21221 + ... + 26312.

It is an arithmetic number, because the mean of its divisors is an integer number (12121170).

Almost surely, 2^121019018 is an apocalyptic number.

121019018 is a deficient number, since it is larger than the sum of its proper divisors (72919702).

121019018 is a wasteful number, since it uses less digits than its factorization.

121019018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47621.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 121019018 is about 11000.8644205808. The cubic root of 121019018 is about 494.6346561054.

Adding to 121019018 its reverse (810910121), we get a palindrome (931929139).

The spelling of 121019018 in words is "one hundred twenty-one million, nineteen thousand, eighteen".