12211131213 has 8 divisors (see below), whose sum is σ = 18090564800. Its totient is φ = 8140754124.

The previous prime is 12211131209. The next prime is 12211131217. The reversal of 12211131213 is 31213111221.

It is an interprime number because it is at equal distance from previous prime (12211131209) and next prime (12211131217).

It is not a de Polignac number, because 12211131213 - 2² = 12211131209 is a prime.

It is a super-2 number, since 2×12211131213² (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 (12211131217) 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, 226132033 + ... + 226132086.

It is an arithmetic number, because the mean of its divisors is an integer number (2261320600).

Almost surely, 2^12211131213 is an apocalyptic number.

It is an amenable number.

12211131213 is a deficient number, since it is larger than the sum of its proper divisors (5879433587).

12211131213 is an equidigital number, since it uses as much as digits as its factorization.

12211131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452264128 (or 452264122 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 12211131213 its reverse (31213111221), we get a palindrome (43424242434).

The spelling of 12211131213 in words is "twelve billion, two hundred eleven million, one hundred thirty-one thousand, two hundred thirteen".