213201221131111 has 4 divisors (see below), whose sum is σ = 213212097099352. Its totient is φ = 213190345162872.

The previous prime is 213201221131099. The next prime is 213201221131123. The reversal of 213201221131111 is 111131122102312.

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

It is an interprime number because it is at equal distance from previous prime (213201221131099) and next prime (213201221131123).

It is a cyclic number.

It is not a de Polignac number, because 213201221131111 - 2⁷ = 213201221130983 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 (213201221101111) 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, 5437954716 + ... + 5437993921.

It is an arithmetic number, because the mean of its divisors is an integer number (53303024274838).

Almost surely, 2^{213201221131111} is an apocalyptic number.

213201221131111 is a deficient number, since it is larger than the sum of its proper divisors (10875968241).

213201221131111 is a wasteful number, since it uses less digits than its factorization.

213201221131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10875968240.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 213201221131111 its reverse (111131122102312), we get a palindrome (324332343233423).

The spelling of 213201221131111 in words is "two hundred thirteen trillion, two hundred one billion, two hundred twenty-one million, one hundred thirty-one thousand, one hundred eleven".