218112121211812 has 6 divisors (see below), whose sum is σ = 381696212120678. Its totient is φ = 109056060605904.

The previous prime is 218112121211791. The next prime is 218112121211821.

218112121211812 is nontrivially palindromic in base 10.

218112121211812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 176831059310656 + 41281061901156 = 13297784^2 + 6425034^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27264015151473 + ... + 27264015151480.

Almost surely, 2^{218112121211812} is an apocalyptic number.

It is an amenable number.

218112121211812 is a deficient number, since it is larger than the sum of its proper divisors (163584090908866).

218112121211812 is a wasteful number, since it uses less digits than its factorization.

218112121211812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54528030302957 (or 54528030302955 counting only the distinct ones).

The product of its digits is 2048, while the sum is 34.

The spelling of 218112121211812 in words is "two hundred eighteen trillion, one hundred twelve billion, one hundred twenty-one million, two hundred eleven thousand, eight hundred twelve".