4212040121 has 2 divisors, whose sum is σ = 4212040122. Its totient is φ = 4212040120.

The previous prime is 4212040087. The next prime is 4212040141. The reversal of 4212040121 is 1210402124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3999930025 + 212110096 = 63245^2 + 14564^2 .

It is a cyclic number.

It is not a de Polignac number, because 4212040121 - 2¹⁴ = 4212023737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4212040121.

It is not a weakly prime, because it can be changed into another prime (4212040141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2106020060 + 2106020061.

It is an arithmetic number, because the mean of its divisors is an integer number (2106020061).

Almost surely, 2^4212040121 is an apocalyptic number.

It is an amenable number.

4212040121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4212040121 is an equidigital number, since it uses as much as digits as its factorization.

4212040121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 4212040121 is about 64900.2320565959. The cubic root of 4212040121 is about 1614.9689113372.

Adding to 4212040121 its reverse (1210402124), we get a palindrome (5422442245).

The spelling of 4212040121 in words is "four billion, two hundred twelve million, forty thousand, one hundred twenty-one".