12211135949 has 4 divisors (see below), whose sum is σ = 12211545120. Its totient is φ = 12210726780.

The previous prime is 12211135933. The next prime is 12211135957. The reversal of 12211135949 is 94953111221.

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: 94953111221 = 122477 ⋅775273.

It is a cyclic number.

It is not a de Polignac number, because 12211135949 - 2⁴ = 12211135933 is a prime.

It is a super-2 number, since 2×12211135949² (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 (12211135249) 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, 155969 + ... + 220790.

It is an arithmetic number, because the mean of its divisors is an integer number (3052886280).

Almost surely, 2^12211135949 is an apocalyptic number.

It is an amenable number.

12211135949 is a deficient number, since it is larger than the sum of its proper divisors (409171).

12211135949 is an equidigital number, since it uses as much as digits as its factorization.

12211135949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409170.

The product of its digits is 19440, while the sum is 38.

The spelling of 12211135949 in words is "twelve billion, two hundred eleven million, one hundred thirty-five thousand, nine hundred forty-nine".