11131020213 has 4 divisors (see below), whose sum is σ = 14841360288. Its totient is φ = 7420680140.

The previous prime is 11131020209. The next prime is 11131020311. The reversal of 11131020213 is 31202013111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31202013111 = 3 ⋅10400671037.

It is a cyclic number.

It is not a de Polignac number, because 11131020213 - 2² = 11131020209 is a prime.

It is a super-2 number, since 2×11131020213² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11131020192 and 11131020201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131030213) 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, 1855170033 + ... + 1855170038.

It is an arithmetic number, because the mean of its divisors is an integer number (3710340072).

Almost surely, 2^11131020213 is an apocalyptic number.

It is an amenable number.

11131020213 is a deficient number, since it is larger than the sum of its proper divisors (3710340075).

11131020213 is an equidigital number, since it uses as much as digits as its factorization.

11131020213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710340074.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11131020213 its reverse (31202013111), we get a palindrome (42333033324).

The spelling of 11131020213 in words is "eleven billion, one hundred thirty-one million, twenty thousand, two hundred thirteen".