20012210117 has 2 divisors, whose sum is σ = 20012210118. Its totient is φ = 20012210116.

The previous prime is 20012210111. The next prime is 20012210129. The reversal of 20012210117 is 71101221002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18692631841 + 1319578276 = 136721^2 + 36326^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012210117 - 2¹⁰ = 20012209093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012210095 and 20012210104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012210111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006105058 + 10006105059.

It is an arithmetic number, because the mean of its divisors is an integer number (10006105059).

Almost surely, 2^20012210117 is an apocalyptic number.

It is an amenable number.

20012210117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012210117 is an equidigital number, since it uses as much as digits as its factorization.

20012210117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 20012210117 its reverse (71101221002), we get a palindrome (91113431119).

The spelling of 20012210117 in words is "twenty billion, twelve million, two hundred ten thousand, one hundred seventeen".