100001209969 has 2 divisors, whose sum is σ = 100001209970. Its totient is φ = 100001209968.

The previous prime is 100001209961. The next prime is 100001210003. The reversal of 100001209969 is 969902100001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99911623744 + 89586225 = 316088^2 + 9465^2 .

It is a cyclic number.

It is not a de Polignac number, because 100001209969 - 2³ = 100001209961 is a prime.

It is a super-2 number, since 2×100001209969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100001209961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000604984 + 50000604985.

It is an arithmetic number, because the mean of its divisors is an integer number (50000604985).

Almost surely, 2^100001209969 is an apocalyptic number.

It is an amenable number.

100001209969 is a deficient number, since it is larger than the sum of its proper divisors (1).

100001209969 is an equidigital number, since it uses as much as digits as its factorization.

100001209969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 37.

The spelling of 100001209969 in words is "one hundred billion, one million, two hundred nine thousand, nine hundred sixty-nine".