11211200257 has 2 divisors, whose sum is σ = 11211200258. Its totient is φ = 11211200256.

The previous prime is 11211200197. The next prime is 11211200279. The reversal of 11211200257 is 75200211211.

It is an a-pointer prime, because the next prime (11211200279) can be obtained adding 11211200257 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9754327696 + 1456872561 = 98764^2 + 38169^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211200257 - 2²⁷ = 11076982529 is a prime.

It is a super-2 number, since 2×11211200257² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11211230257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605600128 + 5605600129.

It is an arithmetic number, because the mean of its divisors is an integer number (5605600129).

Almost surely, 2^11211200257 is an apocalyptic number.

It is an amenable number.

11211200257 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211200257 is an equidigital number, since it uses as much as digits as its factorization.

11211200257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 22.

Adding to 11211200257 its reverse (75200211211), we get a palindrome (86411411468).

The spelling of 11211200257 in words is "eleven billion, two hundred eleven million, two hundred thousand, two hundred fifty-seven".