100420243209 has 40 divisors (see below), whose sum is σ = 176236116672. Its totient is φ = 56179150560.

The previous prime is 100420243207. The next prime is 100420243211. The reversal of 100420243209 is 902342024001.

100420243209 is a `hidden beast` number, since 10 + 0 + 420 + 24 + 3 + 209 = 666.

It is an interprime number because it is at equal distance from previous prime (100420243207) and next prime (100420243211).

It is not a de Polignac number, because 100420243209 - 2¹ = 100420243207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (100420243207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4323229 + ... + 4346394.

Almost surely, 2^100420243209 is an apocalyptic number.

It is an amenable number.

100420243209 is a deficient number, since it is larger than the sum of its proper divisors (75815873463).

100420243209 is a wasteful number, since it uses less digits than its factorization.

100420243209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8669659 (or 8669650 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The spelling of 100420243209 in words is "one hundred billion, four hundred twenty million, two hundred forty-three thousand, two hundred nine".