4012215121 has 2 divisors, whose sum is σ = 4012215122. Its totient is φ = 4012215120.

The previous prime is 4012215091. The next prime is 4012215133. The reversal of 4012215121 is 1215122104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3708201025 + 304014096 = 60895^2 + 17436^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012215121 - 2²⁵ = 3978660689 is a prime.

It is not a weakly prime, because it can be changed into another prime (4012215521) 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, 2006107560 + 2006107561.

It is an arithmetic number, because the mean of its divisors is an integer number (2006107561).

Almost surely, 2^4012215121 is an apocalyptic number.

It is an amenable number.

4012215121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012215121 is an equidigital number, since it uses as much as digits as its factorization.

4012215121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 4012215121 is about 63342.0486012254. The cubic root of 4012215121 is about 1589.0152679218.

Adding to 4012215121 its reverse (1215122104), we get a palindrome (5227337225).

The spelling of 4012215121 in words is "four billion, twelve million, two hundred fifteen thousand, one hundred twenty-one".