11121647 has 2 divisors, whose sum is σ = 11121648. Its totient is φ = 11121646.

The previous prime is 11121637. The next prime is 11121661. The reversal of 11121647 is 74612111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11121647 - 2¹² = 11117551 is a prime.

It is equal to p₇₃₄₀₄₅ and since 11121647 and 734045 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560823 + 5560824.

It is an arithmetic number, because the mean of its divisors is an integer number (5560824).

Almost surely, 2^11121647 is an apocalyptic number.

11121647 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121647 is an equidigital number, since it uses as much as digits as its factorization.

11121647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 23.

The square root of 11121647 is about 3334.9133422025. The cubic root of 11121647 is about 223.2148251245.

Adding to 11121647 its reverse (74612111), we get a palindrome (85733758).

The spelling of 11121647 in words is "eleven million, one hundred twenty-one thousand, six hundred forty-seven".