1001011221229 has 2 divisors, whose sum is σ = 1001011221230. Its totient is φ = 1001011221228.

The previous prime is 1001011221209. The next prime is 1001011221257. The reversal of 1001011221229 is 9221221101001.

1001011221229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 526607108329 + 474404112900 = 725677^2 + 688770^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001011221229 - 2⁷ = 1001011221101 is a prime.

It is a super-4 number, since 4×1001011221229⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001011221209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500505610614 + 500505610615.

It is an arithmetic number, because the mean of its divisors is an integer number (500505610615).

Almost surely, 2^{1001011221229} is an apocalyptic number.

It is an amenable number.

1001011221229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001011221229 is an equidigital number, since it uses as much as digits as its factorization.

1001011221229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 1001011221229 in words is "one trillion, one billion, eleven million, two hundred twenty-one thousand, two hundred twenty-nine".