29261865121 has 2 divisors, whose sum is σ = 29261865122. Its totient is φ = 29261865120.

The previous prime is 29261865109. The next prime is 29261865133. The reversal of 29261865121 is 12156816292.

It is a balanced prime because it is at equal distance from previous prime (29261865109) and next prime (29261865133).

It can be written as a sum of positive squares in only one way, i.e., 23736024225 + 5525840896 = 154065^2 + 74336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29261865121 is a prime.

It is not a weakly prime, because it can be changed into another prime (29261865151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14630932560 + 14630932561.

It is an arithmetic number, because the mean of its divisors is an integer number (14630932561).

Almost surely, 2^29261865121 is an apocalyptic number.

It is an amenable number.

29261865121 is a deficient number, since it is larger than the sum of its proper divisors (1).

29261865121 is an equidigital number, since it uses as much as digits as its factorization.

29261865121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 43.

The spelling of 29261865121 in words is "twenty-nine billion, two hundred sixty-one million, eight hundred sixty-five thousand, one hundred twenty-one".