129250334949121 has 4 divisors (see below), whose sum is σ = 132402782143044. Its totient is φ = 126097887755200.

The previous prime is 129250334949107. The next prime is 129250334949191. The reversal of 129250334949121 is 121949433052921.

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 36789513870096 + 92460821079025 = 6065436^2 + 9615655^2 .

It is a cyclic number.

It is not a de Polignac number, because 129250334949121 - 2²³ = 129250326560513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129250334949101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1576223596900 + ... + 1576223596981.

It is an arithmetic number, because the mean of its divisors is an integer number (33100695535761).

Almost surely, 2^{129250334949121} is an apocalyptic number.

It is an amenable number.

129250334949121 is a deficient number, since it is larger than the sum of its proper divisors (3152447193923).

129250334949121 is an equidigital number, since it uses as much as digits as its factorization.

129250334949121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152447193922.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 129250334949121 in words is "one hundred twenty-nine trillion, two hundred fifty billion, three hundred thirty-four million, nine hundred forty-nine thousand, one hundred twenty-one".