1011212117 has 2 divisors, whose sum is σ = 1011212118. Its totient is φ = 1011212116.

The previous prime is 1011212093. The next prime is 1011212143. The reversal of 1011212117 is 7112121101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 589566961 + 421645156 = 24281^2 + 20534^2 .

It is an emirp because it is prime and its reverse (7112121101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011212117 - 2²⁰ = 1010163541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011212095 and 1011212104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011212177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505606058 + 505606059.

It is an arithmetic number, because the mean of its divisors is an integer number (505606059).

Almost surely, 2^1011212117 is an apocalyptic number.

It is an amenable number.

1011212117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011212117 is an equidigital number, since it uses as much as digits as its factorization.

1011212117 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 17.

The square root of 1011212117 is about 31799.5615850282. The cubic root of 1011212117 is about 1003.7234907421.

Adding to 1011212117 its reverse (7112121101), we get a palindrome (8123333218).

The spelling of 1011212117 in words is "one billion, eleven million, two hundred twelve thousand, one hundred seventeen".