39402331012321 has 4 divisors (see below), whose sum is σ = 40048270865044. Its totient is φ = 38756391159600.

The previous prime is 39402331012313. The next prime is 39402331012357. The reversal of 39402331012321 is 12321013320493.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1071868866721 + 38330462145600 = 1035311^2 + 6191160^2 .

It is a cyclic number.

It is not a de Polignac number, because 39402331012321 - 2³ = 39402331012313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39402331012921) 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, 322969926270 + ... + 322969926391.

It is an arithmetic number, because the mean of its divisors is an integer number (10012067716261).

Almost surely, 2^{39402331012321} is an apocalyptic number.

It is an amenable number.

39402331012321 is a deficient number, since it is larger than the sum of its proper divisors (645939852723).

39402331012321 is an equidigital number, since it uses as much as digits as its factorization.

39402331012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645939852722.

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 39402331012321 in words is "thirty-nine trillion, four hundred two billion, three hundred thirty-one million, twelve thousand, three hundred twenty-one".