20110130197 has 2 divisors, whose sum is σ = 20110130198. Its totient is φ = 20110130196.

The previous prime is 20110130179. The next prime is 20110130203. The reversal of 20110130197 is 79103101102.

Together with previous prime (20110130179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16670424996 + 3439705201 = 129114^2 + 58649^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110130197 - 2²⁷ = 19975912469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110130597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055065098 + 10055065099.

It is an arithmetic number, because the mean of its divisors is an integer number (10055065099).

Almost surely, 2^20110130197 is an apocalyptic number.

It is an amenable number.

20110130197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110130197 is an equidigital number, since it uses as much as digits as its factorization.

20110130197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 25.

Adding to 20110130197 its reverse (79103101102), we get a palindrome (99213231299).

The spelling of 20110130197 in words is "twenty billion, one hundred ten million, one hundred thirty thousand, one hundred ninety-seven".