218818105101 has 16 divisors (see below), whose sum is σ = 325008340800. Its totient is φ = 145503720144.

The previous prime is 218818105031. The next prime is 218818105109. The reversal of 218818105101 is 101501818812.

It is a happy number.

It is not a de Polignac number, because 218818105101 - 2³⁵ = 184458366733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218818105109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10406431 + ... + 10427436.

It is an arithmetic number, because the mean of its divisors is an integer number (20313021300).

Almost surely, 2^218818105101 is an apocalyptic number.

It is an amenable number.

218818105101 is a deficient number, since it is larger than the sum of its proper divisors (106190235699).

218818105101 is a wasteful number, since it uses less digits than its factorization.

218818105101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20834265 (or 20834259 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 36.

The spelling of 218818105101 in words is "two hundred eighteen billion, eight hundred eighteen million, one hundred five thousand, one hundred one".