102440040312 has 32 divisors (see below), whose sum is σ = 257530838400. Its totient is φ = 33955915104.

The previous prime is 102440040293. The next prime is 102440040319. The reversal of 102440040312 is 213040044201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102440040319) 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, 11918428 + ... + 11927019.

It is an arithmetic number, because the mean of its divisors is an integer number (8047838700).

Almost surely, 2^102440040312 is an apocalyptic number.

102440040312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102440040312 is an abundant number, since it is smaller than the sum of its proper divisors (155090798088).

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

102440040312 is a wasteful number, since it uses less digits than its factorization.

102440040312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23845635 (or 23845631 counting only the distinct ones).

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

Adding to 102440040312 its reverse (213040044201), we get a palindrome (315480084513).

The spelling of 102440040312 in words is "one hundred two billion, four hundred forty million, forty thousand, three hundred twelve".