218993032111 has 4 divisors (see below), whose sum is σ = 250277750992. Its totient is φ = 187708313232.

The previous prime is 218993032103. The next prime is 218993032151. The reversal of 218993032111 is 111230399812.

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

It is a cyclic number.

It is not a de Polignac number, because 218993032111 - 2³ = 218993032103 is a prime.

It is a super-2 number, since 2×218993032111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218993032151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15642359430 + ... + 15642359443.

It is an arithmetic number, because the mean of its divisors is an integer number (62569437748).

Almost surely, 2^218993032111 is an apocalyptic number.

218993032111 is a deficient number, since it is larger than the sum of its proper divisors (31284718881).

218993032111 is an equidigital number, since it uses as much as digits as its factorization.

218993032111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31284718880.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 218993032111 in words is "two hundred eighteen billion, nine hundred ninety-three million, thirty-two thousand, one hundred eleven".