29715121361 has 4 divisors (see below), whose sum is σ = 30122177892. Its totient is φ = 29308064832.

The previous prime is 29715121339. The next prime is 29715121363. The reversal of 29715121361 is 16312151792.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18945870736 + 10769250625 = 137644^2 + 103775^2 .

It is a cyclic number.

It is not a de Polignac number, because 29715121361 - 2¹⁴ = 29715104977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29715121363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203528156 + ... + 203528301.

It is an arithmetic number, because the mean of its divisors is an integer number (7530544473).

Almost surely, 2^29715121361 is an apocalyptic number.

It is an amenable number.

29715121361 is a deficient number, since it is larger than the sum of its proper divisors (407056531).

29715121361 is an equidigital number, since it uses as much as digits as its factorization.

29715121361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407056530.

The product of its digits is 22680, while the sum is 38.

The spelling of 29715121361 in words is "twenty-nine billion, seven hundred fifteen million, one hundred twenty-one thousand, three hundred sixty-one".