2121210107 has 2 divisors, whose sum is σ = 2121210108. Its totient is φ = 2121210106.

The previous prime is 2121210097. The next prime is 2121210127. The reversal of 2121210107 is 7010121212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121210107 - 2³⁰ = 1047468283 is a prime.

It is a super-3 number, since 3×2121210107³ (a number of 29 digits) contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (2121210127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060605053 + 1060605054.

It is an arithmetic number, because the mean of its divisors is an integer number (1060605054).

Almost surely, 2^2121210107 is an apocalyptic number.

2121210107 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121210107 is an equidigital number, since it uses as much as digits as its factorization.

2121210107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 2121210107 is about 46056.5967804830. The cubic root of 2121210107 is about 1284.8760360262.

Adding to 2121210107 its reverse (7010121212), we get a palindrome (9131331319).

The spelling of 2121210107 in words is "two billion, one hundred twenty-one million, two hundred ten thousand, one hundred seven".