100020012 has 48 divisors (see below), whose sum is σ = 244564992. Its totient is φ = 31775040.

The previous prime is 100019977. The next prime is 100020023. The reversal of 100020012 is 210020001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

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, 22918 + ... + 26930.

It is an arithmetic number, because the mean of its divisors is an integer number (5095104).

Almost surely, 2^100020012 is an apocalyptic number.

100020012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100020012 is an abundant number, since it is smaller than the sum of its proper divisors (144544980).

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

100020012 is a wasteful number, since it uses less digits than its factorization.

100020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118 (or 4116 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 100020012 is about 10001.0005499450. Note that the first 3 decimals coincide. The cubic root of 100020012 is about 464.1898437880.

Adding to 100020012 its reverse (210020001), we get a palindrome (310040013).

It can be divided in two parts, 1000 and 20012, that added together give a palindrome (21012).

The spelling of 100020012 in words is "one hundred million, twenty thousand, twelve".