20121020110073 has 2 divisors, whose sum is σ = 20121020110074. Its totient is φ = 20121020110072.

The previous prime is 20121020110007. The next prime is 20121020110109. The reversal of 20121020110073 is 37001102012102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19678779149929 + 442240960144 = 4436077^2 + 665012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121020110073 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20121020610073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060510055036 + 10060510055037.

It is an arithmetic number, because the mean of its divisors is an integer number (10060510055037).

Almost surely, 2^{20121020110073} is an apocalyptic number.

It is an amenable number.

20121020110073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121020110073 is an equidigital number, since it uses as much as digits as its factorization.

20121020110073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 20121020110073 its reverse (37001102012102), we get a palindrome (57122122122175).

The spelling of 20121020110073 in words is "twenty trillion, one hundred twenty-one billion, twenty million, one hundred ten thousand, seventy-three".