29914123721 has 2 divisors, whose sum is σ = 29914123722. Its totient is φ = 29914123720.

The previous prime is 29914123717. The next prime is 29914123727. The reversal of 29914123721 is 12732141992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29687290000 + 226833721 = 172300^2 + 15061^2 .

It is a cyclic number.

It is not a de Polignac number, because 29914123721 - 2² = 29914123717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (29914123727) 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, 14957061860 + 14957061861.

It is an arithmetic number, because the mean of its divisors is an integer number (14957061861).

Almost surely, 2^29914123721 is an apocalyptic number.

It is an amenable number.

29914123721 is a deficient number, since it is larger than the sum of its proper divisors (1).

29914123721 is an equidigital number, since it uses as much as digits as its factorization.

29914123721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The spelling of 29914123721 in words is "twenty-nine billion, nine hundred fourteen million, one hundred twenty-three thousand, seven hundred twenty-one".