11123211949 has 2 divisors, whose sum is σ = 11123211950. Its totient is φ = 11123211948.

The previous prime is 11123211943. The next prime is 11123211989. The reversal of 11123211949 is 94911232111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8598852900 + 2524359049 = 92730^2 + 50243^2 .

It is an emirp because it is prime and its reverse (94911232111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11123211949 - 2³ = 11123211941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11123211941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561605974 + 5561605975.

It is an arithmetic number, because the mean of its divisors is an integer number (5561605975).

Almost surely, 2^11123211949 is an apocalyptic number.

It is an amenable number.

11123211949 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123211949 is an equidigital number, since it uses as much as digits as its factorization.

11123211949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 34.

The spelling of 11123211949 in words is "eleven billion, one hundred twenty-three million, two hundred eleven thousand, nine hundred forty-nine".