1212211199 has 2 divisors, whose sum is σ = 1212211200. Its totient is φ = 1212211198.

The previous prime is 1212211183. The next prime is 1212211201. The reversal of 1212211199 is 9911122121.

It is a strong prime.

It is an emirp because it is prime and its reverse (9911122121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212211199 - 2⁴ = 1212211183 is a prime.

Together with 1212211201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212211499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105599 + 606105600.

It is an arithmetic number, because the mean of its divisors is an integer number (606105600).

Almost surely, 2^1212211199 is an apocalyptic number.

1212211199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212211199 is an equidigital number, since it uses as much as digits as its factorization.

1212211199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 29.

The square root of 1212211199 is about 34816.8235053113. The cubic root of 1212211199 is about 1066.2509488192.

The spelling of 1212211199 in words is "one billion, two hundred twelve million, two hundred eleven thousand, one hundred ninety-nine".