2216640121 has 2 divisors, whose sum is σ = 2216640122. Its totient is φ = 2216640120.

The previous prime is 2216640103. The next prime is 2216640131. The reversal of 2216640121 is 1210466122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1684692025 + 531948096 = 41045^2 + 23064^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216640121 - 2²¹ = 2214542969 is a prime.

It is not a weakly prime, because it can be changed into another prime (2216640131) 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, 1108320060 + 1108320061.

It is an arithmetic number, because the mean of its divisors is an integer number (1108320061).

Almost surely, 2^2216640121 is an apocalyptic number.

It is an amenable number.

2216640121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2216640121 is an equidigital number, since it uses as much as digits as its factorization.

2216640121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2216640121 is about 47081.2077266503. The cubic root of 2216640121 is about 1303.8623048382.

The spelling of 2216640121 in words is "two billion, two hundred sixteen million, six hundred forty thousand, one hundred twenty-one".