129228335271925 has 12 divisors (see below), whose sum is σ = 160350465412260. Its totient is φ = 103313423265920.

The previous prime is 129228335271913. The next prime is 129228335271947. The reversal of 129228335271925 is 529172533822921.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 25054019149201 + 104174316122724 = 5005399^2 + 10206582^2 .

It is not a de Polignac number, because 129228335271925 - 2³¹ = 129226187788277 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1731085720 + ... + 1731160369.

It is an arithmetic number, because the mean of its divisors is an integer number (13362538784355).

Almost surely, 2^{129228335271925} is an apocalyptic number.

It is an amenable number.

129228335271925 is a deficient number, since it is larger than the sum of its proper divisors (31122130140335).

129228335271925 is a wasteful number, since it uses less digits than its factorization.

129228335271925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462247592 (or 3462247587 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 61.

The spelling of 129228335271925 in words is "one hundred twenty-nine trillion, two hundred twenty-eight billion, three hundred thirty-five million, two hundred seventy-one thousand, nine hundred twenty-five".