211155015241 has 2 divisors, whose sum is σ = 211155015242. Its totient is φ = 211155015240.

The previous prime is 211155015221. The next prime is 211155015257. The reversal of 211155015241 is 142510551112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195036173641 + 16118841600 = 441629^2 + 126960^2 .

It is a cyclic number.

It is not a de Polignac number, because 211155015241 - 2⁹ = 211155014729 is a prime.

It is a super-2 number, since 2×211155015241² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211155015221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105577507620 + 105577507621.

It is an arithmetic number, because the mean of its divisors is an integer number (105577507621).

Almost surely, 2^211155015241 is an apocalyptic number.

It is an amenable number.

211155015241 is a deficient number, since it is larger than the sum of its proper divisors (1).

211155015241 is an equidigital number, since it uses as much as digits as its factorization.

211155015241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000, while the sum is 28.

Adding to 211155015241 its reverse (142510551112), we get a palindrome (353665566353).

The spelling of 211155015241 in words is "two hundred eleven billion, one hundred fifty-five million, fifteen thousand, two hundred forty-one".