100421012 has 12 divisors (see below), whose sum is σ = 176136576. Its totient is φ = 50096280.

The previous prime is 100421011. The next prime is 100421017. The reversal of 100421012 is 210124001.

It is a super-2 number, since 2×100421012² = 20168759302208288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100420984 and 100421002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421011) 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, 26564 + ... + 30107.

It is an arithmetic number, because the mean of its divisors is an integer number (14678048).

Almost surely, 2^100421012 is an apocalyptic number.

It is an amenable number.

100421012 is a deficient number, since it is larger than the sum of its proper divisors (75715564).

100421012 is a wasteful number, since it uses less digits than its factorization.

100421012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57118 (or 57116 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 100421012 is about 10021.0284901301. The cubic root of 100421012 is about 464.8093595519.

Adding to 100421012 its reverse (210124001), we get a palindrome (310545013).

The spelling of 100421012 in words is "one hundred million, four hundred twenty-one thousand, twelve".