2121223207 has 2 divisors, whose sum is σ = 2121223208. Its totient is φ = 2121223206.

The previous prime is 2121223201. The next prime is 2121223219. The reversal of 2121223207 is 7023221212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121223207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121223201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060611603 + 1060611604.

It is an arithmetic number, because the mean of its divisors is an integer number (1060611604).

Almost surely, 2^2121223207 is an apocalyptic number.

2121223207 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121223207 is an equidigital number, since it uses as much as digits as its factorization.

2121223207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 2121223207 is about 46056.7389965898. The cubic root of 2121223207 is about 1284.8786810323.

Adding to 2121223207 its reverse (7023221212), we get a palindrome (9144444419).

The spelling of 2121223207 in words is "two billion, one hundred twenty-one million, two hundred twenty-three thousand, two hundred seven".