100000212009 has 32 divisors (see below), whose sum is σ = 137721855744. Its totient is φ = 64512364800.

The previous prime is 100000211939. The next prime is 100000212049. The reversal of 100000212009 is 900212000001.

It is a happy number.

It is not a de Polignac number, because 100000212009 - 2²⁵ = 99966657577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100000212049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4211679 + ... + 4235355.

It is an arithmetic number, because the mean of its divisors is an integer number (4303807992).

Almost surely, 2^100000212009 is an apocalyptic number.

It is an amenable number.

100000212009 is a deficient number, since it is larger than the sum of its proper divisors (37721643735).

100000212009 is a wasteful number, since it uses less digits than its factorization.

100000212009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24097.

The product of its (nonzero) digits is 36, while the sum is 15.

The spelling of 100000212009 in words is "one hundred billion, two hundred twelve thousand, nine".