84624023321221 has 2 divisors, whose sum is σ = 84624023321222. Its totient is φ = 84624023321220.

The previous prime is 84624023321153. The next prime is 84624023321231. The reversal of 84624023321221 is 12212332042648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64714704257025 + 19909319064196 = 8044545^2 + 4461986^2 .

It is a cyclic number.

It is not a de Polignac number, because 84624023321221 - 2²⁷ = 84623889103493 is a prime.

It is a super-2 number, since 2×84624023321221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84624023321231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42312011660610 + 42312011660611.

It is an arithmetic number, because the mean of its divisors is an integer number (42312011660611).

Almost surely, 2^{84624023321221} is an apocalyptic number.

It is an amenable number.

84624023321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

84624023321221 is an equidigital number, since it uses as much as digits as its factorization.

84624023321221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 40.

Adding to 84624023321221 its reverse (12212332042648), we get a palindrome (96836355363869).

The spelling of 84624023321221 in words is "eighty-four trillion, six hundred twenty-four billion, twenty-three million, three hundred twenty-one thousand, two hundred twenty-one".