29384442221 has 2 divisors, whose sum is σ = 29384442222. Its totient is φ = 29384442220.

The previous prime is 29384442173. The next prime is 29384442259. The reversal of 29384442221 is 12224448392.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27464775625 + 1919666596 = 165725^2 + 43814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29384442221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29384441221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14692221110 + 14692221111.

It is an arithmetic number, because the mean of its divisors is an integer number (14692221111).

Almost surely, 2^29384442221 is an apocalyptic number.

It is an amenable number.

29384442221 is a deficient number, since it is larger than the sum of its proper divisors (1).

29384442221 is an equidigital number, since it uses as much as digits as its factorization.

29384442221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 41.

The spelling of 29384442221 in words is "twenty-nine billion, three hundred eighty-four million, four hundred forty-two thousand, two hundred twenty-one".