218201102811 has 72 divisors (see below), whose sum is σ = 352745593200. Its totient is φ = 129458891520.

The previous prime is 218201102803. The next prime is 218201102891. The reversal of 218201102811 is 118201102812.

It is not a de Polignac number, because 218201102811 - 2³ = 218201102803 is a prime.

It is a super-2 number, since 2×218201102811² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (218201102891) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6772801 + ... + 6804941.

It is an arithmetic number, because the mean of its divisors is an integer number (4899244350).

Almost surely, 2^218201102811 is an apocalyptic number.

218201102811 is a deficient number, since it is larger than the sum of its proper divisors (134544490389).

218201102811 is a wasteful number, since it uses less digits than its factorization.

218201102811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32269 (or 32229 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 27.

Subtracting from 218201102811 its reverse (118201102812), we obtain a palindrome (99999999999).

It can be divided in two parts, 21820110 and 2811, that added together give a triangular number (21822921 = T₆₆₀₆).

The spelling of 218201102811 in words is "two hundred eighteen billion, two hundred one million, one hundred two thousand, eight hundred eleven".