129225155441 has 2 divisors, whose sum is σ = 129225155442. Its totient is φ = 129225155440.

The previous prime is 129225155429. The next prime is 129225155459. The reversal of 129225155441 is 144551522921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97221734416 + 32003421025 = 311804^2 + 178895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129225155441 is a prime.

It is a super-2 number, since 2×129225155441² (a number of 23 digits) contains 22 as substring.

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 (129225155401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64612577720 + 64612577721.

It is an arithmetic number, because the mean of its divisors is an integer number (64612577721).

Almost surely, 2^129225155441 is an apocalyptic number.

It is an amenable number.

129225155441 is a deficient number, since it is larger than the sum of its proper divisors (1).

129225155441 is an equidigital number, since it uses as much as digits as its factorization.

129225155441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144000, while the sum is 41.

The spelling of 129225155441 in words is "one hundred twenty-nine billion, two hundred twenty-five million, one hundred fifty-five thousand, four hundred forty-one".