12120211031018 has 16 divisors (see below), whose sum is σ = 18225552665160. Its totient is φ = 6045028087296.

The previous prime is 12120211031017. The next prime is 12120211031063. The reversal of 12120211031018 is 81013011202121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11063852580169 + 1056358450849 = 3326237^2 + 1027793^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12120211030984 and 12120211031002.

It is not an unprimeable number, because it can be changed into a prime (12120211031017) 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, 19417196 + ... + 20031672.

Almost surely, 2^{12120211031018} is an apocalyptic number.

12120211031018 is a deficient number, since it is larger than the sum of its proper divisors (6105341634142).

12120211031018 is a wasteful number, since it uses less digits than its factorization.

12120211031018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639001.

The product of its (nonzero) digits is 192, while the sum is 23.

Adding to 12120211031018 its reverse (81013011202121), we get a palindrome (93133222233139).

The spelling of 12120211031018 in words is "twelve trillion, one hundred twenty billion, two hundred eleven million, thirty-one thousand, eighteen".