390307069821021 has 8 divisors (see below), whose sum is σ = 533102339267904. Its totient is φ = 253858256794080.

The previous prime is 390307069821013. The next prime is 390307069821037. The reversal of 390307069821021 is 120128960703093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 390307069821021 - 2³ = 390307069821013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390307069820021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586614104841 + ... + 1586614105086.

It is an arithmetic number, because the mean of its divisors is an integer number (66637792408488).

Almost surely, 2^{390307069821021} is an apocalyptic number.

It is an amenable number.

390307069821021 is a deficient number, since it is larger than the sum of its proper divisors (142795269446883).

390307069821021 is a wasteful number, since it uses less digits than its factorization.

390307069821021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173228209971.

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 390307069821021 in words is "three hundred ninety trillion, three hundred seven billion, sixty-nine million, eight hundred twenty-one thousand, twenty-one".