1211012213 has 2 divisors, whose sum is σ = 1211012214. Its totient is φ = 1211012212.

The previous prime is 1211012207. The next prime is 1211012233. The reversal of 1211012213 is 3122101121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1153145764 + 57866449 = 33958^2 + 7607^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211012213 - 2²⁰ = 1209963637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211012233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605506106 + 605506107.

It is an arithmetic number, because the mean of its divisors is an integer number (605506107).

Almost surely, 2^1211012213 is an apocalyptic number.

It is an amenable number.

1211012213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211012213 is an equidigital number, since it uses as much as digits as its factorization.

1211012213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1211012213 is about 34799.6007592041. The cubic root of 1211012213 is about 1065.8992934631.

Adding to 1211012213 its reverse (3122101121), we get a palindrome (4333113334).

The spelling of 1211012213 in words is "one billion, two hundred eleven million, twelve thousand, two hundred thirteen".