1210213117 has 2 divisors, whose sum is σ = 1210213118. Its totient is φ = 1210213116.

The previous prime is 1210213073. The next prime is 1210213141. The reversal of 1210213117 is 7113120121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 900840196 + 309372921 = 30014^2 + 17589^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210213117 - 2⁷ = 1210212989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210213094 and 1210213103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210213177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605106558 + 605106559.

It is an arithmetic number, because the mean of its divisors is an integer number (605106559).

Almost surely, 2^1210213117 is an apocalyptic number.

It is an amenable number.

1210213117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210213117 is an equidigital number, since it uses as much as digits as its factorization.

1210213117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 1210213117 is about 34788.1174684690. The cubic root of 1210213117 is about 1065.6647945132.

Adding to 1210213117 its reverse (7113120121), we get a palindrome (8323333238).

The spelling of 1210213117 in words is "one billion, two hundred ten million, two hundred thirteen thousand, one hundred seventeen".