11021312257 has 2 divisors, whose sum is σ = 11021312258. Its totient is φ = 11021312256.

The previous prime is 11021312251. The next prime is 11021312297. The reversal of 11021312257 is 75221312011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6082596081 + 4938716176 = 77991^2 + 70276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021312257 is a prime.

It is not a weakly prime, because it can be changed into another prime (11021312251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510656128 + 5510656129.

It is an arithmetic number, because the mean of its divisors is an integer number (5510656129).

Almost surely, 2^11021312257 is an apocalyptic number.

It is an amenable number.

11021312257 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021312257 is an equidigital number, since it uses as much as digits as its factorization.

11021312257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

Adding to 11021312257 its reverse (75221312011), we get a palindrome (86242624268).

The spelling of 11021312257 in words is "eleven billion, twenty-one million, three hundred twelve thousand, two hundred fifty-seven".