11131123213 has 8 divisors (see below), whose sum is σ = 12775883328. Its totient is φ = 9500013024.

The previous prime is 11131123183. The next prime is 11131123243. The reversal of 11131123213 is 31232113111.

It is an interprime number because it is at equal distance from previous prime (11131123183) and next prime (11131123243).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11131123213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131123243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3410731 + ... + 3413992.

It is an arithmetic number, because the mean of its divisors is an integer number (1596985416).

Almost surely, 2^11131123213 is an apocalyptic number.

It is an amenable number.

11131123213 is a deficient number, since it is larger than the sum of its proper divisors (1644760115).

11131123213 is an equidigital number, since it uses as much as digits as its factorization.

11131123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6824963.

The product of its digits is 108, while the sum is 19.

Adding to 11131123213 its reverse (31232113111), we get a palindrome (42363236324).

The spelling of 11131123213 in words is "eleven billion, one hundred thirty-one million, one hundred twenty-three thousand, two hundred thirteen".