1212211201 has 2 divisors, whose sum is σ = 1212211202. Its totient is φ = 1212211200.

The previous prime is 1212211199. The next prime is 1212211213. The reversal of 1212211201 is 1021122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1074266176 + 137945025 = 32776^2 + 11745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212211201 - 2¹ = 1212211199 is a prime.

Together with 1212211199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1212211241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105600 + 606105601.

It is an arithmetic number, because the mean of its divisors is an integer number (606105601).

Almost surely, 2^1212211201 is an apocalyptic number.

It is an amenable number.

1212211201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212211201 is an equidigital number, since it uses as much as digits as its factorization.

1212211201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1212211201 is about 34816.8235340331. The cubic root of 1212211201 is about 1066.2509494056.

Adding to 1212211201 its reverse (1021122121), we get a palindrome (2233333322).

The spelling of 1212211201 in words is "one billion, two hundred twelve million, two hundred eleven thousand, two hundred one".