11901229 has 2 divisors, whose sum is σ = 11901230. Its totient is φ = 11901228.

The previous prime is 11901217. The next prime is 11901247. The reversal of 11901229 is 92210911.

11901229 is nontrivially palindromic in base 13.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8838729 + 3062500 = 2973^2 + 1750^2 .

It is a cyclic number.

It is not a de Polignac number, because 11901229 - 2⁷ = 11901101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11901259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5950614 + 5950615.

It is an arithmetic number, because the mean of its divisors is an integer number (5950615).

Almost surely, 2^11901229 is an apocalyptic number.

It is an amenable number.

11901229 is a deficient number, since it is larger than the sum of its proper divisors (1).

11901229 is an equidigital number, since it uses as much as digits as its factorization.

11901229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 11901229 is about 3449.8157921837. The cubic root of 11901229 is about 228.3129807044.

The spelling of 11901229 in words is "eleven million, nine hundred one thousand, two hundred twenty-nine".