1212001021118 has 4 divisors (see below), whose sum is σ = 1818001531680. Its totient is φ = 606000510558.

The previous prime is 1212001021117. The next prime is 1212001021157. The reversal of 1212001021118 is 8111201002121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212001021118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212001021117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303000255278 + ... + 303000255281.

It is an arithmetic number, because the mean of its divisors is an integer number (454500382920).

Almost surely, 2^{1212001021118} is an apocalyptic number.

1212001021118 is a deficient number, since it is larger than the sum of its proper divisors (606000510562).

1212001021118 is an equidigital number, since it uses as much as digits as its factorization.

1212001021118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606000510561.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 1212001021118 its reverse (8111201002121), we get a palindrome (9323202023239).

The spelling of 1212001021118 in words is "one trillion, two hundred twelve billion, one million, twenty-one thousand, one hundred eighteen".