129200370042 has 16 divisors (see below), whose sum is σ = 259132757760. Its totient is φ = 42944787072.

The previous prime is 129200370037. The next prime is 129200370097. The reversal of 129200370042 is 240073002921.

It is a junction number, because it is equal to n+sod(n) for n = 129200369991 and 129200370009.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 30498442 + ... + 30502677.

It is an arithmetic number, because the mean of its divisors is an integer number (16195797360).

Almost surely, 2^129200370042 is an apocalyptic number.

129200370042 is an abundant number, since it is smaller than the sum of its proper divisors (129932387718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129200370042 is a wasteful number, since it uses less digits than its factorization.

129200370042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61001477.

The product of its (nonzero) digits is 6048, while the sum is 30.

Adding to 129200370042 its reverse (240073002921), we get a palindrome (369273372963).

It can be divided in two parts, 129 and 200370042, that added together give a triangular number (200370171 = T₂₀₀₁₈).

The spelling of 129200370042 in words is "one hundred twenty-nine billion, two hundred million, three hundred seventy thousand, forty-two".