4120121111 has 2 divisors, whose sum is σ = 4120121112. Its totient is φ = 4120121110.

The previous prime is 4120121087. The next prime is 4120121141. The reversal of 4120121111 is 1111210214.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4120121111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4120121141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2060060555 + 2060060556.

It is an arithmetic number, because the mean of its divisors is an integer number (2060060556).

Almost surely, 2^4120121111 is an apocalyptic number.

4120121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

4120121111 is an equidigital number, since it uses as much as digits as its factorization.

4120121111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 4120121111 is about 64188.1695563910. The cubic root of 4120121111 is about 1603.1346244818.

Adding to 4120121111 its reverse (1111210214), we get a palindrome (5231331325).

The spelling of 4120121111 in words is "four billion, one hundred twenty million, one hundred twenty-one thousand, one hundred eleven".