1229101091 has 2 divisors, whose sum is σ = 1229101092. Its totient is φ = 1229101090.

The previous prime is 1229101061. The next prime is 1229101109. The reversal of 1229101091 is 1901019221.

Together with next prime (1229101109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1229101091 - 2¹⁴ = 1229084707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1229101091.

It is not a weakly prime, because it can be changed into another prime (1229101031) 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, 614550545 + 614550546.

It is an arithmetic number, because the mean of its divisors is an integer number (614550546).

Almost surely, 2^1229101091 is an apocalyptic number.

1229101091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229101091 is an equidigital number, since it uses as much as digits as its factorization.

1229101091 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 26.

The square root of 1229101091 is about 35058.5380613625. The cubic root of 1229101091 is about 1071.1801957287.

The spelling of 1229101091 in words is "one billion, two hundred twenty-nine million, one hundred one thousand, ninety-one".