2121121207 has 2 divisors, whose sum is σ = 2121121208. Its totient is φ = 2121121206.

The previous prime is 2121121201. The next prime is 2121121217. The reversal of 2121121207 is 7021211212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121121207 - 2³ = 2121121199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060560603 + 1060560604.

It is an arithmetic number, because the mean of its divisors is an integer number (1060560604).

Almost surely, 2^2121121207 is an apocalyptic number.

2121121207 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121121207 is an equidigital number, since it uses as much as digits as its factorization.

2121121207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 2121121207 is about 46055.6316534688. The cubic root of 2121121207 is about 1284.8580860401.

Adding to 2121121207 its reverse (7021211212), we get a palindrome (9142332419).

The spelling of 2121121207 in words is "two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred seven".