101220100117 has 2 divisors, whose sum is σ = 101220100118. Its totient is φ = 101220100116.

The previous prime is 101220099979. The next prime is 101220100127. The reversal of 101220100117 is 711001022101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75378251601 + 25841848516 = 274551^2 + 160754^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220100117 - 2¹¹ = 101220098069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101220100117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101220100127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610050058 + 50610050059.

It is an arithmetic number, because the mean of its divisors is an integer number (50610050059).

Almost surely, 2^101220100117 is an apocalyptic number.

It is an amenable number.

101220100117 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220100117 is an equidigital number, since it uses as much as digits as its factorization.

101220100117 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 101220100117 its reverse (711001022101), we get a palindrome (812221122218).

The spelling of 101220100117 in words is "one hundred one billion, two hundred twenty million, one hundred thousand, one hundred seventeen".