213020211111 has 16 divisors (see below), whose sum is σ = 291716690304. Its totient is φ = 138168954144.

The previous prime is 213020211097. The next prime is 213020211133. The reversal of 213020211111 is 111112020312.

It is not a de Polignac number, because 213020211111 - 2¹⁰ = 213020210087 is a prime.

It is a super-2 number, since 2×213020211111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213020211161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4577020 + ... + 4623326.

It is an arithmetic number, because the mean of its divisors is an integer number (18232293144).

Almost surely, 2^213020211111 is an apocalyptic number.

213020211111 is a deficient number, since it is larger than the sum of its proper divisors (78696479193).

213020211111 is a wasteful number, since it uses less digits than its factorization.

213020211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87790.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 213020211111 its reverse (111112020312), we get a palindrome (324132231423).

The spelling of 213020211111 in words is "two hundred thirteen billion, twenty million, two hundred eleven thousand, one hundred eleven".