123811229 has 2 divisors, whose sum is σ = 123811230. Its totient is φ = 123811228.

The previous prime is 123811223. The next prime is 123811271. The reversal of 123811229 is 922118321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116532025 + 7279204 = 10795^2 + 2698^2 .

It is a cyclic number.

It is not a de Polignac number, because 123811229 - 2¹⁶ = 123745693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123811223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61905614 + 61905615.

It is an arithmetic number, because the mean of its divisors is an integer number (61905615).

Almost surely, 2^123811229 is an apocalyptic number.

It is an amenable number.

123811229 is a deficient number, since it is larger than the sum of its proper divisors (1).

123811229 is an equidigital number, since it uses as much as digits as its factorization.

123811229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 123811229 is about 11127.0494292063. The cubic root of 123811229 is about 498.4099206557.

The spelling of 123811229 in words is "one hundred twenty-three million, eight hundred eleven thousand, two hundred twenty-nine".