29895316810421 has 2 divisors, whose sum is σ = 29895316810422. Its totient is φ = 29895316810420.

The previous prime is 29895316810391. The next prime is 29895316810423. The reversal of 29895316810421 is 12401861359892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28300112446225 + 1595204364196 = 5319785^2 + 1263014^2 .

It is a cyclic number.

It is not a de Polignac number, because 29895316810421 - 2¹⁸ = 29895316548277 is a prime.

Together with 29895316810423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29895316810423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14947658405210 + 14947658405211.

It is an arithmetic number, because the mean of its divisors is an integer number (14947658405211).

Almost surely, 2^{29895316810421} is an apocalyptic number.

It is an amenable number.

29895316810421 is a deficient number, since it is larger than the sum of its proper divisors (1).

29895316810421 is an equidigital number, since it uses as much as digits as its factorization.

29895316810421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 59.

The spelling of 29895316810421 in words is "twenty-nine trillion, eight hundred ninety-five billion, three hundred sixteen million, eight hundred ten thousand, four hundred twenty-one".