11122121047 has 2 divisors, whose sum is σ = 11122121048. Its totient is φ = 11122121046.

The previous prime is 11122120981. The next prime is 11122121053. The reversal of 11122121047 is 74012122111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11122121047 - 2¹¹ = 11122118999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11122121077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561060523 + 5561060524.

It is an arithmetic number, because the mean of its divisors is an integer number (5561060524).

Almost surely, 2^11122121047 is an apocalyptic number.

11122121047 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122121047 is an equidigital number, since it uses as much as digits as its factorization.

11122121047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 11122121047 its reverse (74012122111), we get a palindrome (85134243158).

The spelling of 11122121047 in words is "eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, forty-seven".