100020112009 has 2 divisors, whose sum is σ = 100020112010. Its totient is φ = 100020112008.

The previous prime is 100020112001. The next prime is 100020112019. The reversal of 100020112009 is 900211020001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62386051984 + 37634060025 = 249772^2 + 193995^2 .

It is a cyclic number.

It is not a de Polignac number, because 100020112009 - 2³ = 100020112001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100020111983 and 100020112001.

It is not a weakly prime, because it can be changed into another prime (100020112001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010056004 + 50010056005.

It is an arithmetic number, because the mean of its divisors is an integer number (50010056005).

Almost surely, 2^100020112009 is an apocalyptic number.

It is an amenable number.

100020112009 is a deficient number, since it is larger than the sum of its proper divisors (1).

100020112009 is an equidigital number, since it uses as much as digits as its factorization.

100020112009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 100020112009 in words is "one hundred billion, twenty million, one hundred twelve thousand, nine".