84141221 has 2 divisors, whose sum is σ = 84141222. Its totient is φ = 84141220.

The previous prime is 84141217. The next prime is 84141227. The reversal of 84141221 is 12214148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57988225 + 26152996 = 7615^2 + 5114^2 .

It is a cyclic number.

It is not a de Polignac number, because 84141221 - 2² = 84141217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84141227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42070610 + 42070611.

It is an arithmetic number, because the mean of its divisors is an integer number (42070611).

Almost surely, 2^84141221 is an apocalyptic number.

It is an amenable number.

84141221 is a deficient number, since it is larger than the sum of its proper divisors (1).

84141221 is an equidigital number, since it uses as much as digits as its factorization.

84141221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 23.

The square root of 84141221 is about 9172.8523917046. The cubic root of 84141221 is about 438.1972051789.

Adding to 84141221 its reverse (12214148), we get a palindrome (96355369).

The spelling of 84141221 in words is "eighty-four million, one hundred forty-one thousand, two hundred twenty-one".