213101211 has 4 divisors (see below), whose sum is σ = 284134952. Its totient is φ = 142067472.

The previous prime is 213101201. The next prime is 213101221. The reversal of 213101211 is 112101312.

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 (213101201) and next prime (213101221).

It is not a de Polignac number, because 213101211 - 2⁵ = 213101179 is a prime.

It is a super-2 number, since 2×213101211² = 90824252259333042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213101201) 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, 35516866 + ... + 35516871.

It is an arithmetic number, because the mean of its divisors is an integer number (71033738).

Almost surely, 2^213101211 is an apocalyptic number.

213101211 is a deficient number, since it is larger than the sum of its proper divisors (71033741).

213101211 is an equidigital number, since it uses as much as digits as its factorization.

213101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71033740.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 213101211 is about 14597.9865392457. The cubic root of 213101211 is about 597.3038387830.

Adding to 213101211 its reverse (112101312), we get a palindrome (325202523).

It can be divided in two parts, 213101 and 211, that added together give a palindrome (213312).

The spelling of 213101211 in words is "two hundred thirteen million, one hundred one thousand, two hundred eleven".