12102100001 has 4 divisors (see below), whose sum is σ = 12307220400. Its totient is φ = 11896979604.

The previous prime is 12102099991. The next prime is 12102100009. The reversal of 12102100001 is 10000120121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10000120121 = 79 ⋅126583799.

It is a cyclic number.

It is not a de Polignac number, because 12102100001 - 2⁶ = 12102099937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12102100009) 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, 102560111 + ... + 102560228.

It is an arithmetic number, because the mean of its divisors is an integer number (3076805100).

Almost surely, 2^12102100001 is an apocalyptic number.

It is an amenable number.

12102100001 is a deficient number, since it is larger than the sum of its proper divisors (205120399).

12102100001 is an equidigital number, since it uses as much as digits as its factorization.

12102100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205120398.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 12102100001 its reverse (10000120121), we get a palindrome (22102220122).

The spelling of 12102100001 in words is "twelve billion, one hundred two million, one hundred thousand, one".