11231221213 has 8 divisors (see below), whose sum is σ = 11500517600. Its totient is φ = 10962293328.

The previous prime is 11231221171. The next prime is 11231221219. The reversal of 11231221213 is 31212213211.

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

It is a cyclic number.

It is not a de Polignac number, because 11231221213 - 2²⁹ = 10694350301 is a prime.

It is a super-2 number, since 2×11231221213² (a number of 21 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 (11231221219) 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, 29943 + ... + 152836.

It is an arithmetic number, because the mean of its divisors is an integer number (1437564700).

Almost surely, 2^11231221213 is an apocalyptic number.

It is an amenable number.

11231221213 is a deficient number, since it is larger than the sum of its proper divisors (269296387).

11231221213 is a wasteful number, since it uses less digits than its factorization.

11231221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184251.

The product of its digits is 144, while the sum is 19.

Adding to 11231221213 its reverse (31212213211), we get a palindrome (42443434424).

The spelling of 11231221213 in words is "eleven billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred thirteen".