1211020229 has 2 divisors, whose sum is σ = 1211020230. Its totient is φ = 1211020228.

The previous prime is 1211020207. The next prime is 1211020259. The reversal of 1211020229 is 9220201121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 685235329 + 525784900 = 26177^2 + 22930^2 .

It is an emirp because it is prime and its reverse (9220201121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211020229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211020229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211020259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605510114 + 605510115.

It is an arithmetic number, because the mean of its divisors is an integer number (605510115).

Almost surely, 2^1211020229 is an apocalyptic number.

It is an amenable number.

1211020229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211020229 is an equidigital number, since it uses as much as digits as its factorization.

1211020229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1211020229 is about 34799.7159327486. The cubic root of 1211020229 is about 1065.9016452780.

The spelling of 1211020229 in words is "one billion, two hundred eleven million, twenty thousand, two hundred twenty-nine".