1211000020018 has 8 divisors (see below), whose sum is σ = 1817309889648. Its totient is φ = 605230056804.

The previous prime is 1211000020007. The next prime is 1211000020057. The reversal of 1211000020018 is 8100200001121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1211000019983 and 1211000020010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134970996 + ... + 134979967.

It is an arithmetic number, because the mean of its divisors is an integer number (227163736206).

Almost surely, 2^{1211000020018} is an apocalyptic number.

1211000020018 is a deficient number, since it is larger than the sum of its proper divisors (606309869630).

1211000020018 is a wasteful number, since it uses less digits than its factorization.

1211000020018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269953208.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211000020018 its reverse (8100200001121), we get a palindrome (9311200021139).

The spelling of 1211000020018 in words is "one trillion, two hundred eleven billion, twenty thousand, eighteen".