216371058011 has 4 divisors (see below), whose sum is σ = 218977938312. Its totient is φ = 213764177712.

The previous prime is 216371057993. The next prime is 216371058041. The reversal of 216371058011 is 110850173612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216371058011 is a prime.

It is a super-2 number, since 2×216371058011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216371058041) 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, 1303440026 + ... + 1303440191.

It is an arithmetic number, because the mean of its divisors is an integer number (54744484578).

Almost surely, 2^216371058011 is an apocalyptic number.

216371058011 is a deficient number, since it is larger than the sum of its proper divisors (2606880301).

216371058011 is an equidigital number, since it uses as much as digits as its factorization.

216371058011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606880300.

The product of its (nonzero) digits is 10080, while the sum is 35.

The spelling of 216371058011 in words is "two hundred sixteen billion, three hundred seventy-one million, fifty-eight thousand, eleven".