29121302281 has 2 divisors, whose sum is σ = 29121302282. Its totient is φ = 29121302280.

The previous prime is 29121302237. The next prime is 29121302291. The reversal of 29121302281 is 18220312192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24309799056 + 4811503225 = 155916^2 + 69365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29121302281 is a prime.

It is a super-2 number, since 2×29121302281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29121302291) 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, 14560651140 + 14560651141.

It is an arithmetic number, because the mean of its divisors is an integer number (14560651141).

Almost surely, 2^29121302281 is an apocalyptic number.

It is an amenable number.

29121302281 is a deficient number, since it is larger than the sum of its proper divisors (1).

29121302281 is an equidigital number, since it uses as much as digits as its factorization.

29121302281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 29121302281 in words is "twenty-nine billion, one hundred twenty-one million, three hundred two thousand, two hundred eighty-one".