100120812 has 24 divisors (see below), whose sum is σ = 254853312. Its totient is φ = 30339600.

The previous prime is 100120807. The next prime is 100120879. The reversal of 100120812 is 218021001.

It is a junction number, because it is equal to n+sod(n) for n = 100120791 and 100120800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379114 + ... + 379377.

It is an arithmetic number, because the mean of its divisors is an integer number (10618888).

Almost surely, 2^100120812 is an apocalyptic number.

100120812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100120812 is an abundant number, since it is smaller than the sum of its proper divisors (154732500).

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

100120812 is a wasteful number, since it uses less digits than its factorization.

100120812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758509 (or 758507 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 100120812 is about 10006.0387766588. The cubic root of 100120812 is about 464.3457280146.

Adding to 100120812 its reverse (218021001), we get a palindrome (318141813).

The spelling of 100120812 in words is "one hundred million, one hundred twenty thousand, eight hundred twelve".