321240042102 has 16 divisors (see below), whose sum is σ = 734262953472. Its totient is φ = 91782869160.

The previous prime is 321240042083. The next prime is 321240042107. The reversal of 321240042102 is 201240042123.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321240042107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3824286174 + ... + 3824286257.

It is an arithmetic number, because the mean of its divisors is an integer number (45891434592).

Almost surely, 2^321240042102 is an apocalyptic number.

321240042102 is an abundant number, since it is smaller than the sum of its proper divisors (413022911370).

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

321240042102 is a wasteful number, since it uses less digits than its factorization.

321240042102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7648572443.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 321240042102 its sum of digits (21), we get a palindrome (321240042123).

Adding to 321240042102 its reverse (201240042123), we get a palindrome (522480084225).

The spelling of 321240042102 in words is "three hundred twenty-one billion, two hundred forty million, forty-two thousand, one hundred two".