11217321461 has 2 divisors, whose sum is σ = 11217321462. Its totient is φ = 11217321460.

The previous prime is 11217321443. The next prime is 11217321491. The reversal of 11217321461 is 16412371211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7336779025 + 3880542436 = 85655^2 + 62294^2 .

It is a cyclic number.

It is not a de Polignac number, because 11217321461 - 2⁶ = 11217321397 is a prime.

It is a super-2 number, since 2×11217321461² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11217321431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5608660730 + 5608660731.

It is an arithmetic number, because the mean of its divisors is an integer number (5608660731).

Almost surely, 2^11217321461 is an apocalyptic number.

It is an amenable number.

11217321461 is a deficient number, since it is larger than the sum of its proper divisors (1).

11217321461 is an equidigital number, since it uses as much as digits as its factorization.

11217321461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

Adding to 11217321461 its reverse (16412371211), we get a palindrome (27629692672).

The spelling of 11217321461 in words is "eleven billion, two hundred seventeen million, three hundred twenty-one thousand, four hundred sixty-one".