29319057375221 has 2 divisors, whose sum is σ = 29319057375222. Its totient is φ = 29319057375220.

The previous prime is 29319057375217. The next prime is 29319057375239. The reversal of 29319057375221 is 12257375091392.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18876374643025 + 10442682732196 = 4344695^2 + 3231514^2 .

It is a cyclic number.

It is not a de Polignac number, because 29319057375221 - 2² = 29319057375217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29319057377221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14659528687610 + 14659528687611.

It is an arithmetic number, because the mean of its divisors is an integer number (14659528687611).

Almost surely, 2^{29319057375221} is an apocalyptic number.

It is an amenable number.

29319057375221 is a deficient number, since it is larger than the sum of its proper divisors (1).

29319057375221 is an equidigital number, since it uses as much as digits as its factorization.

29319057375221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7144200, while the sum is 56.

The spelling of 29319057375221 in words is "twenty-nine trillion, three hundred nineteen billion, fifty-seven million, three hundred seventy-five thousand, two hundred twenty-one".