3120071729820 has 24 divisors (see below), whose sum is σ = 8736200843664. Its totient is φ = 832019127936.

The previous prime is 3120071729809. The next prime is 3120071729891. The reversal of 3120071729820 is 289271700213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26000597689 + ... + 26000597808.

It is an arithmetic number, because the mean of its divisors is an integer number (364008368486).

Almost surely, 2^{3120071729820} is an apocalyptic number.

3120071729820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3120071729820 is an abundant number, since it is smaller than the sum of its proper divisors (5616129113844).

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

3120071729820 is a wasteful number, since it uses less digits than its factorization.

3120071729820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52001195509 (or 52001195507 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 3120071729820 in words is "three trillion, one hundred twenty billion, seventy-one million, seven hundred twenty-nine thousand, eight hundred twenty".