1211022229 has 2 divisors, whose sum is σ = 1211022230. Its totient is φ = 1211022228.

The previous prime is 1211022193. The next prime is 1211022271. The reversal of 1211022229 is 9222201121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203743025 + 7279204 = 34695^2 + 2698^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211022229 - 2¹⁹ = 1210497941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211022929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605511114 + 605511115.

It is an arithmetic number, because the mean of its divisors is an integer number (605511115).

Almost surely, 2^1211022229 is an apocalyptic number.

It is an amenable number.

1211022229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211022229 is an equidigital number, since it uses as much as digits as its factorization.

1211022229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1211022229 is about 34799.7446686035. The cubic root of 1211022229 is about 1065.9022320566.

The spelling of 1211022229 in words is "one billion, two hundred eleven million, twenty-two thousand, two hundred twenty-nine".