213231111102011 has 4 divisors (see below), whose sum is σ = 213553699773024. Its totient is φ = 212908522431000.

The previous prime is 213231111101971. The next prime is 213231111102041. The reversal of 213231111102011 is 110201111132312.

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-213231111102011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213231111102041) 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, 161294334515 + ... + 161294335836.

It is an arithmetic number, because the mean of its divisors is an integer number (53388424943256).

Almost surely, 2^{213231111102011} is an apocalyptic number.

213231111102011 is a deficient number, since it is larger than the sum of its proper divisors (322588671013).

213231111102011 is an equidigital number, since it uses as much as digits as its factorization.

213231111102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322588671012.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 213231111102011 its reverse (110201111132312), we get a palindrome (323432222234323).

The spelling of 213231111102011 in words is "two hundred thirteen trillion, two hundred thirty-one billion, one hundred eleven million, one hundred two thousand, eleven".