10101220117 has 2 divisors, whose sum is σ = 10101220118. Its totient is φ = 10101220116.

The previous prime is 10101220111. The next prime is 10101220121. The reversal of 10101220117 is 71102210101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9035262916 + 1065957201 = 95054^2 + 32649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10101220117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10101220117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10101220111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050610058 + 5050610059.

It is an arithmetic number, because the mean of its divisors is an integer number (5050610059).

Almost surely, 2^10101220117 is an apocalyptic number.

It is an amenable number.

10101220117 is a deficient number, since it is larger than the sum of its proper divisors (1).

10101220117 is an equidigital number, since it uses as much as digits as its factorization.

10101220117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 10101220117 its reverse (71102210101), we get a palindrome (81203430218).

The spelling of 10101220117 in words is "ten billion, one hundred one million, two hundred twenty thousand, one hundred seventeen".