39000120021 has 24 divisors (see below), whose sum is σ = 57446311104. Its totient is φ = 25491490560.

The previous prime is 39000119971. The next prime is 39000120041. The reversal of 39000120021 is 12002100093.

It is a happy number.

It is not a de Polignac number, because 39000120021 - 2¹¹ = 39000117973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39000119976 and 39000120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39000120041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115345 + ... + 302166.

It is an arithmetic number, because the mean of its divisors is an integer number (2393596296).

Almost surely, 2^39000120021 is an apocalyptic number.

It is an amenable number.

39000120021 is a deficient number, since it is larger than the sum of its proper divisors (18446191083).

39000120021 is a wasteful number, since it uses less digits than its factorization.

39000120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417721 (or 417718 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The spelling of 39000120021 in words is "thirty-nine billion, one hundred twenty thousand, twenty-one".