100320012 has 48 divisors (see below), whose sum is σ = 280099680. Its totient is φ = 30867264.

The previous prime is 100320007. The next prime is 100320023. The reversal of 100320012 is 210023001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100319976 and 100320003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34323 + ... + 37130.

It is an arithmetic number, because the mean of its divisors is an integer number (5835410).

Almost surely, 2^100320012 is an apocalyptic number.

100320012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100320012 is an abundant number, since it is smaller than the sum of its proper divisors (179779668).

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

100320012 is a wasteful number, since it uses less digits than its factorization.

100320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71479 (or 71471 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 100320012 is about 10015.9878194814. The cubic root of 100320012 is about 464.6534775242.

Adding to 100320012 its reverse (210023001), we get a palindrome (310343013).

The spelling of 100320012 in words is "one hundred million, three hundred twenty thousand, twelve".