20102100120097 has 4 divisors (see below), whose sum is σ = 20105633629060. Its totient is φ = 20098566611136.

The previous prime is 20102100120041. The next prime is 20102100120103. The reversal of 20102100120097 is 79002100120102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11278877427216 + 8823222692881 = 3358404^2 + 2970391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102100120097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102100160097) 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, 1766745948 + ... + 1766757325.

It is an arithmetic number, because the mean of its divisors is an integer number (5026408407265).

Almost surely, 2^{20102100120097} is an apocalyptic number.

It is an amenable number.

20102100120097 is a deficient number, since it is larger than the sum of its proper divisors (3533508963).

20102100120097 is an equidigital number, since it uses as much as digits as its factorization.

20102100120097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533508962.

The product of its (nonzero) digits is 504, while the sum is 25.

Adding to 20102100120097 its reverse (79002100120102), we get a palindrome (99104200240199).

The spelling of 20102100120097 in words is "twenty trillion, one hundred two billion, one hundred million, one hundred twenty thousand, ninety-seven".