4212402521 has 2 divisors, whose sum is σ = 4212402522. Its totient is φ = 4212402520.

The previous prime is 4212402517. The next prime is 4212402533. The reversal of 4212402521 is 1252042124.

4212402521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4096000000 + 116402521 = 64000^2 + 10789^2 .

It is a cyclic number.

It is not a de Polignac number, because 4212402521 - 2² = 4212402517 is a prime.

It is not a weakly prime, because it can be changed into another prime (4212402121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2106201260 + 2106201261.

It is an arithmetic number, because the mean of its divisors is an integer number (2106201261).

Almost surely, 2^4212402521 is an apocalyptic number.

It is an amenable number.

4212402521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4212402521 is an equidigital number, since it uses as much as digits as its factorization.

4212402521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 4212402521 is about 64903.0239742341. The cubic root of 4212402521 is about 1615.0152268147.

Adding to 4212402521 its reverse (1252042124), we get a palindrome (5464444645).

The spelling of 4212402521 in words is "four billion, two hundred twelve million, four hundred two thousand, five hundred twenty-one".