43420320301221 has 12 divisors (see below), whose sum is σ = 62718303588460. Its totient is φ = 28946851053120.

The previous prime is 43420320301213. The next prime is 43420320301271. The reversal of 43420320301221 is 12210302302434.

43420320301221 is a `hidden beast` number, since 4 + 3 + 420 + 3 + 203 + 0 + 12 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 23795996196996 + 19624324104225 = 4878114^2 + 4429935^2 .

It is not a de Polignac number, because 43420320301221 - 2³ = 43420320301213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43420320301201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10794465 + ... + 14260473.

Almost surely, 2^{43420320301221} is an apocalyptic number.

It is an amenable number.

43420320301221 is a deficient number, since it is larger than the sum of its proper divisors (19297983287239).

43420320301221 is a wasteful number, since it uses less digits than its factorization.

43420320301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4857956 (or 4857953 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 43420320301221 its reverse (12210302302434), we get a palindrome (55630622603655).

The spelling of 43420320301221 in words is "forty-three trillion, four hundred twenty billion, three hundred twenty million, three hundred one thousand, two hundred twenty-one".