39835302820221 has 4 divisors (see below), whose sum is σ = 53113737093632. Its totient is φ = 26556868546812.

The previous prime is 39835302820213. The next prime is 39835302820223. The reversal of 39835302820221 is 12202820353893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39835302820221 - 2³ = 39835302820213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39835302820223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6639217136701 + ... + 6639217136706.

It is an arithmetic number, because the mean of its divisors is an integer number (13278434273408).

Almost surely, 2^{39835302820221} is an apocalyptic number.

It is an amenable number.

39835302820221 is a deficient number, since it is larger than the sum of its proper divisors (13278434273411).

39835302820221 is a wasteful number, since it uses less digits than its factorization.

39835302820221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13278434273410.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 39835302820221 in words is "thirty-nine trillion, eight hundred thirty-five billion, three hundred two million, eight hundred twenty thousand, two hundred twenty-one".