100420212 has 12 divisors (see below), whose sum is σ = 234313856. Its totient is φ = 33473400.

The previous prime is 100420181. The next prime is 100420217. The reversal of 100420212 is 212024001.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 8368351 = 100420212 / (1 + 0 + 0 + 4 + 2 + 0 + 2 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100420217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4184164 + ... + 4184187.

Almost surely, 2^100420212 is an apocalyptic number.

100420212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100420212 is an abundant number, since it is smaller than the sum of its proper divisors (133893644).

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

100420212 is a wasteful number, since it uses less digits than its factorization.

100420212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8368358 (or 8368356 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 100420212 is about 10020.9885739881. The cubic root of 100420212 is about 464.8081252536.

Adding to 100420212 its reverse (212024001), we get a palindrome (312444213).

The spelling of 100420212 in words is "one hundred million, four hundred twenty thousand, two hundred twelve".