211211110213 has 4 divisors (see below), whose sum is σ = 216362600748. Its totient is φ = 206059619680.

The previous prime is 211211110207. The next prime is 211211110217. The reversal of 211211110213 is 312011112112.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56806908964 + 154404201249 = 238342^2 + 392943^2 .

It is a cyclic number.

It is not a de Polignac number, because 211211110213 - 2²¹ = 211209013061 is a prime.

It is a super-2 number, since 2×211211110213² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211211110217) 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, 2575745206 + ... + 2575745287.

It is an arithmetic number, because the mean of its divisors is an integer number (54090650187).

Almost surely, 2^211211110213 is an apocalyptic number.

It is an amenable number.

211211110213 is a deficient number, since it is larger than the sum of its proper divisors (5151490535).

211211110213 is an equidigital number, since it uses as much as digits as its factorization.

211211110213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151490534.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 211211110213 its reverse (312011112112), we get a palindrome (523222222325).

The spelling of 211211110213 in words is "two hundred eleven billion, two hundred eleven million, one hundred ten thousand, two hundred thirteen".