2121111102107 has 2 divisors, whose sum is σ = 2121111102108. Its totient is φ = 2121111102106.

The previous prime is 2121111102013. The next prime is 2121111102119. The reversal of 2121111102107 is 7012011111212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121111102107 - 2¹⁶ = 2121111036571 is a prime.

It is a super-2 number, since 2×2121111102107² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2121111102167) 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, 1060555551053 + 1060555551054.

It is an arithmetic number, because the mean of its divisors is an integer number (1060555551054).

Almost surely, 2^{2121111102107} is an apocalyptic number.

2121111102107 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121111102107 is an equidigital number, since it uses as much as digits as its factorization.

2121111102107 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 20.

Adding to 2121111102107 its reverse (7012011111212), we get a palindrome (9133122213319).

The spelling of 2121111102107 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, one hundred two thousand, one hundred seven".