4118712121 has 2 divisors, whose sum is σ = 4118712122. Its totient is φ = 4118712120.

The previous prime is 4118712119. The next prime is 4118712127. The reversal of 4118712121 is 1212178114.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4004991225 + 113720896 = 63285^2 + 10664^2 .

It is a cyclic number.

It is not a de Polignac number, because 4118712121 - 2¹ = 4118712119 is a prime.

Together with 4118712119, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4118712121.

It is not a weakly prime, because it can be changed into another prime (4118712127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2059356060 + 2059356061.

It is an arithmetic number, because the mean of its divisors is an integer number (2059356061).

Almost surely, 2^4118712121 is an apocalyptic number.

It is an amenable number.

4118712121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4118712121 is an equidigital number, since it uses as much as digits as its factorization.

4118712121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 28.

The square root of 4118712121 is about 64177.1931530197. The cubic root of 4118712121 is about 1602.9518581562.

The spelling of 4118712121 in words is "four billion, one hundred eighteen million, seven hundred twelve thousand, one hundred twenty-one".