11613211216213 has 4 divisors (see below), whose sum is σ = 11613287098188. Its totient is φ = 11613135334240.

The previous prime is 11613211216177. The next prime is 11613211216223. The reversal of 11613211216213 is 31261211231611.

It is a happy number.

11613211216213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11204330260369 + 408880955844 = 3347287^2 + 639438^2 .

It is a cyclic number.

It is not a de Polignac number, because 11613211216213 - 2¹³ = 11613211208021 is a prime.

It is a super-2 number, since 2×11613211216213² (a number of 27 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 (11613211216223) 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, 37710958 + ... + 38017663.

It is an arithmetic number, because the mean of its divisors is an integer number (2903321774547).

Almost surely, 2^{11613211216213} is an apocalyptic number.

It is an amenable number.

11613211216213 is a deficient number, since it is larger than the sum of its proper divisors (75881975).

11613211216213 is an equidigital number, since it uses as much as digits as its factorization.

11613211216213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75881974.

The product of its digits is 2592, while the sum is 31.

Adding to 11613211216213 its reverse (31261211231611), we get a palindrome (42874422447824).

The spelling of 11613211216213 in words is "eleven trillion, six hundred thirteen billion, two hundred eleven million, two hundred sixteen thousand, two hundred thirteen".