213021113310111 has 4 divisors (see below), whose sum is σ = 284028151080152. Its totient is φ = 142014075540072.

The previous prime is 213021113310067. The next prime is 213021113310127. The reversal of 213021113310111 is 111013311120312.

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

It is not a de Polignac number, because 213021113310111 - 2³⁸ = 212746235403167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213021113310151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35503518885016 + ... + 35503518885021.

It is an arithmetic number, because the mean of its divisors is an integer number (71007037770038).

Almost surely, 2^{213021113310111} is an apocalyptic number.

213021113310111 is a deficient number, since it is larger than the sum of its proper divisors (71007037770041).

213021113310111 is an equidigital number, since it uses as much as digits as its factorization.

213021113310111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71007037770040.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 213021113310111 its reverse (111013311120312), we get a palindrome (324034424430423).

The spelling of 213021113310111 in words is "two hundred thirteen trillion, twenty-one billion, one hundred thirteen million, three hundred ten thousand, one hundred eleven".