11213000261 has 2 divisors, whose sum is σ = 11213000262. Its totient is φ = 11213000260.

The previous prime is 11213000243. The next prime is 11213000303. The reversal of 11213000261 is 16200031211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9298937761 + 1914062500 = 96431^2 + 43750^2 .

It is a cyclic number.

It is not a de Polignac number, because 11213000261 - 2¹⁴ = 11212983877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11213006261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606500130 + 5606500131.

It is an arithmetic number, because the mean of its divisors is an integer number (5606500131).

Almost surely, 2^11213000261 is an apocalyptic number.

It is an amenable number.

11213000261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11213000261 is an equidigital number, since it uses as much as digits as its factorization.

11213000261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11213000261 its reverse (16200031211), we get a palindrome (27413031472).

The spelling of 11213000261 in words is "eleven billion, two hundred thirteen million, two hundred sixty-one", and thus it is an aban number.