1211110213 has 2 divisors, whose sum is σ = 1211110214. Its totient is φ = 1211110212.

The previous prime is 1211110207. The next prime is 1211110231. The reversal of 1211110213 is 3120111121.

It is a happy number.

Together with next prime (1211110231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1120441729 + 90668484 = 33473^2 + 9522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211110213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211110193 and 1211110202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211110013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605555106 + 605555107.

It is an arithmetic number, because the mean of its divisors is an integer number (605555107).

Almost surely, 2^1211110213 is an apocalyptic number.

It is an amenable number.

1211110213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211110213 is an equidigital number, since it uses as much as digits as its factorization.

1211110213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1211110213 is about 34801.0087928497. The cubic root of 1211110213 is about 1065.9280449796.

Adding to 1211110213 its reverse (3120111121), we get a palindrome (4331221334).

The spelling of 1211110213 in words is "one billion, two hundred eleven million, one hundred ten thousand, two hundred thirteen".