1100121229 has 2 divisors, whose sum is σ = 1100121230. Its totient is φ = 1100121228.

The previous prime is 1100121193. The next prime is 1100121233. The reversal of 1100121229 is 9221210011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1089132004 + 10989225 = 33002^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100121229 - 2⁹ = 1100120717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100121829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550060614 + 550060615.

It is an arithmetic number, because the mean of its divisors is an integer number (550060615).

Almost surely, 2^1100121229 is an apocalyptic number.

It is an amenable number.

1100121229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100121229 is an equidigital number, since it uses as much as digits as its factorization.

1100121229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1100121229 is about 33168.0754491424. The cubic root of 1100121229 is about 1032.3180359682.

The spelling of 1100121229 in words is "one billion, one hundred million, one hundred twenty-one thousand, two hundred twenty-nine".