215421343201 has 2 divisors, whose sum is σ = 215421343202. Its totient is φ = 215421343200.

The previous prime is 215421343183. The next prime is 215421343229. The reversal of 215421343201 is 102343124512.

It is an a-pointer prime, because the next prime (215421343229) can be obtained adding 215421343201 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213762899025 + 1658444176 = 462345^2 + 40724^2 .

It is a cyclic number.

It is not a de Polignac number, because 215421343201 - 2¹³ = 215421335009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215421343201.

It is not a weakly prime, because it can be changed into another prime (215421343001) 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, 107710671600 + 107710671601.

It is an arithmetic number, because the mean of its divisors is an integer number (107710671601).

Almost surely, 2^215421343201 is an apocalyptic number.

It is an amenable number.

215421343201 is a deficient number, since it is larger than the sum of its proper divisors (1).

215421343201 is an equidigital number, since it uses as much as digits as its factorization.

215421343201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 215421343201 its reverse (102343124512), we get a palindrome (317764467713).

The spelling of 215421343201 in words is "two hundred fifteen billion, four hundred twenty-one million, three hundred forty-three thousand, two hundred one".